The empirical formula of the compound is CH₂O, and the molecular formula of the compound is C₂H₄O₂.
All of the carbon in the compound is converted into carbon dioxide (14.35 g) and all the hydrogen in the compound is converted to water (5.876 g). This means that we can use these masses to find the masses of carbon, hydrogen, and oxygen in the original compound.
First, we calculate the mass of carbon in carbon dioxide and the mass of hydrogen in water, using their respective molar masses (M(CO₂) = 44 g/mol; M(H₂O) = 18 g/mol):
12 g of carbon : 44 g of carbon dioxide = X : 14.35 g of carbon dioxide
X = 12 g of carbon * 14.35 g of carbon dioxide / 44 g of carbon dioxide
X = 3.914 g of carbon
2 g of hydrogen : 18 g of water = X : 5.876 g of water
X = 2 g of hydrogen : 5.876 g of water / 18 g of water
X = 0.6529 g of hydrogen
Because the compound contains carbon, hydrogen and oxygen, we can now calculate the mass of oxygen in the compound:
m(O) = m(sample) - m(C) - m(H)
m(O) = 9.791 g - 3.914 g - 0.6529 g
m(O) = 5.224 g
Now we use these masses to calculate the number of moles (n) for each of the elements, using their respective molar masses (M(C) = 12 g/mol, M(H) = 1 g/mol, M(O) = 16 g/mol):
n = m/M
n(C) = m(C) / M(C)
n(C) = 3.914 g / 12 g/mol
n(C) = 0.3284 mol
n(H) = m(H) / M(H)
n(H) = 0.6529 g / 1 g/mol
n(H) = 0.6529 mol
n(O) = m(O) / M(O)
n(O) = 5.224 g / 16 g/mol
n(O) = 0.3265 mol
We divide each of these amounts by the smallest of them (0.3265 mol) to obtain the molar ratio of the elements:
carbon: 0.3284 mol / 0.3265 mol = 1.006
hydrogen: 0.6529 mol / 0.3265 mol = 2.000
oxygen: 0.3265 mol / 0.3265 mol = 1.000
These integers are indexes in the empirical formula of the compound - CH₂O
The molar mass of this empirical formula is:
12 g/mol + 2 * 1 g/mol + 16 g/mol = 30 g/mol
We divide the molar mass of the compound by the molar mass of the empirical formula:
60.05 g/mol / 30 g/mol = 2.002
So, we multiply the indexes by 2 to obtain the molecular formula - C₂H₄O₂
You can learn more about empirical formulas here:
brainly.com/question/14425592
#SPJ4
Can I find a tutor help me wit this question?
Chemistry =>Introduction to Chemistry => Scientific Method
A scientific method corresponds to a methodology to obtain new knowledge.
We must start from an idea, an assumption of how a compound or a process behaves, this is our hypothesis.
Following this, we must identify what can affect our process, what are the variables, and what will be the response variable, for this we carry out an experiment.
Once the experiments have been carried out, we must analyze the results, draw conclusions as to why the behavior occurs, and if our hypothesis is true or not.
It is useless for us to obtain new knowledge if we do not share it, We have to share the results, in this way other people can start from that knowledge to create another,
Therefore, the answer will be:
1. Make a hypothesis
2. Conduct an experiment
3. Analyze the experiment data
4. Communicate the results
Which list consists of elements that have the most similar chemical properties?
a) Cu, Zn, Fe
b) K, Ca, Br
c) Mg, Al, Si
d) Cs, Na, K
The list that consists of elements that have the most similar chemical properties is caesium, sodium and potassium (option D).
What is the periodic table?Periodic table is the tabular chart of the chemical elements according to their atomic numbers so that elements with similar properties are in the same group (column).
The periodic table is made up of chemical elements arranged in groups and periods. Chemical elements in the same group possess similar chemical properties.
According to this question, the following elements are in the same group 1:
Caesium is a chemical element (symbol Cs) with an atomic number of 55. It is a soft, gold-colored, highly reactive alkali metal. Sodium is a chemical element (symbol Na) with an atomic number of 11 and atomic weight of 22.98977.Pottasium is an element (symbol K) with an atomic number of 19 and atomic weight of 39.0983.Therefore, Cs, K and Na will have the most similar chemical properties because they belong to the same group.
Learn more about periodic table at: https://brainly.com/question/11155928
#SPJ1
Melting and boiling points of a pure liquid
are........ physical quantities, whereas mass
and volume are........... physical properties.
Melting and boiling points of a pure liquid are intensive physical quantities whereas mass and volume are fundamental physical quantities.
What is melting point?The typical definition of the melting point is the temperature at which a substance transforms from a solid to a liquid.
The temperature at which a liquid under atmospheric pressure changes from a solid to a liquid is known as its melting point. Here, both the liquid and solid phases coexist in equal amounts. The substance's melting point is listed under standard pressure, although it varies with pressure as well.
What is boiling point?The temperature at which a liquid's vapour pressure equals the surrounding atmosphere is known as the boiling point of the liquid. This temperature causes the liquid to become a vapour.
The boiling point of the liquid is influenced by the atmospheric pressure. When a liquid is at high pressure, its boiling point is higher than when it is at atmospheric pressure. Different liquids have variable boiling points at a specific pressure. The standard boiling point of a liquid was established by IUPAC in 1982 as the temperature at which a liquid starts to boil at a pressure of one bar.
Learn more about melting point here :
brainly.com/question/478202
#SPJ13
calculate the volume of concentrated nitric acid (16 m) required to react with 0.41 g of cu(s) if you use 1.86 ml (an excess) of hno3, what volume of 5.0m naoh will you need to neutralize the solution after the copper is completely dissolved?
The volume of Concentrated nitric acid (16 m) required to react with 0.41 g of cu(s) if you use 1.86 ml (an excess) of hno3, what volume of 5.0m naoh will need to neutralize completely dissolved is 0.704 ml
4 HNO3(l) + Cu(s) ==> Cu(NO3)2(s and aq) + 2 NO2(g) + 2 H2O(l)
According to net Ionic equation 4 moles of HNO3 reacts with 1 mole of Cu(s)
moles of Cu in 0.36 gm of Cu = 0.36/63.5
moles = molarity*volume(L)
moles of Cu*4 =moles of HNO3
Let volume of HNO3 be x
0.36/63.5*4 = 16*x
x = 1.42 ml
c. Volume of HNO3 added = 1.64 ml
excess of HNO3 = 1.64-1.42
= 0.22 ml
Normality of NaOH and HNO3 is same i.e. equal moles of NaOH and HNO3 neutralises itself
molarity of NaOH = 5 moles/litre
moles of NaOH = Moles Of HNO3
5*x = 16*0.22
x = 0.704 ml
Learn more about Concentrated nitric Acid here :
https://brainly.com/question/27966990
#SPJ4
phenylacetic acid (c6h5ch2cooh) builds up in the blood of phenylketonurics. when left untreated, this can lead to intellectual disability, seizures, behavioral problems, and even death. a 0.12 m solution has a ph of 2.62. what is the ka of phenylacetic acid?
The [tex]K_{a}[/tex] of phenylacetic acid is 4.76008×[tex]10^{-5}[/tex], when the pH of the solution is 2.62.
As we know,
pH = -log[[tex]H^{+}[/tex]]
[[tex]H^{+}[/tex]] = [tex]10^{-pH}[/tex]
[[tex]H^{+}[/tex]] = [tex]10^{-2.62}[/tex]
[[tex]H^{+}[/tex]] = 2.39×[tex]10^{-3}[/tex]
Also to find [tex]K_{a}[/tex] of phenylacetic acid we know another relation as:
[[tex]H^{+}[/tex]] = [tex]\sqrt{K_{a} .c}[/tex]
2.39×[tex]10^{-3}[/tex] = [tex]\sqrt{K_{a} .0.12}[/tex]
[tex]K_{a}[/tex] = 4.76008×[tex]10^{-5}[/tex]
Therefore, the [tex]K_{a}[/tex] of phenylacetic acid is 4.76008×[tex]10^{-5}[/tex], when the pH of the solution is 2.62.
Learn more about phenylacetic acid here:
https://brainly.com/question/15908906
#SPJ4
A salvage yard contains a mixture of iron, glass, aluminum, and plastic. which property of iron does the salvage yard take advantage of when separating the iron from the rest of the materials?
Magnetic property of iron will help in seperating iron from rest of the materials.
Iron is a metal and have magnetic property. Magnetic property is property of metal in which metal has the attraction power to attract other metal. Iron is ferromagnetic but it requires certain temperature and certain conditions. It occurs below 770°C, which is curie temperature.
There are 5 magnetic properties
Property 1: Intensity of magnetisationProperty 2: Magnetic Field (H) or Magnetic intensity. Property 3: Magnetic susceptibilityProperty 4: RetentivityProperty 5: Coercivitytypes of magnetic materials
Diamagnetic Material,Paramagnetic Materials,Ferromagnetic Materials,Antiferromagnetic Materials,Ferrimagnetic Materials.
To know more about magnetic property visit
https://brainly.com/question/4242549
#SPJ4
If mercury (ii) oxide is heated and decomposes, what would the product of the reaction be? 4hgo → 4 2o2
If mercury (ii) oxide is heated and decomposes, the product of the reaction be 4 Hg.
Mercury is a chemical element with the atomic number 80 and the symbol Hg. Formerly known as hydrargyrum and also known as quicksilver, In order to fragment anything into smaller pieces or to break it into smaller pieces, mercury is used in thermometers, barometers, manometers, sphygmomanometers, float valves, mercury switches, mercury relays, fluorescent lights, and other devices: Methane and carbon dioxide are produced when microbes break down organic waste. staying fresh while decomposes The process of recycling nutrients that an organism (plant or animal) has utilized to develop its body begins with decomposes. It is the process by which the decomposing dead tissues transform into more basic organic forms. For a large number of the species at the base of ecosystems, these serve as a food supply.
Learn more about mercury here :
https://brainly.com/question/4025230
#SPJ4
suppose you are titrating an acid of unknown concentration with a standardized base. at the beginning of the titration, you read the base titrant volume as 2.75 ml. after running the titration and reaching the endpoint, you read the base titrant volume as 26.18 ml. what volume, in ml, of base was required for the titration?
The volume of the standardized base used in the titration was 23.43 mL.
When performing titration, the volume of the standardized base titrant used in the burette is read first (this value doesn't have to be 0, as it depends on the titrator filling the burette). In this case, this value is 2.75 mL.
During the titration, the titrant level in the burette goes down, and when the endpoint is reached, this level can be read. In this experiment, the final volume is 26.18 mL.
The volume used in the titration is obtained by subtracting the starting value from the final volume:
26.18 mL - 2.75 mL = 23.43 mL
You can learn more about titrations here:
brainly.com/question/2728613
#SPJ4
Select all the correct answers. what are three reasons why nebulae contribute more to stellar formation than other regions of the universe? they are rich in hydrogen and helium. they have an unlimited supply of hydrogen. they are far away from black holes. they are dense and hot. they have a strong gravitational pull.
Answer:
1 ) They are wealthy in gases hydrogen and helium. 2 ) They are very hot and dense . 3 ) They have a solid gravitational pull.
Explanation:
Space where huge size of gaseous and dust cloud is present is called nebula. It is mainly made of hydrogen and helium. Nebula exist in the space which is between the stars and it is call as interstellar space.
Helix nebula is closest nebula which is near the earth. It’s distance from earth is about 700 light years.
Dark nebulae are very dense as well as cold. Nebula can be divided into dark nebula and bright nebula. The gas which is present between the stars is always combine with solid grains cosmic dust.
Nebulae contribute more to stellar creation than other areas of the universe for the following three reasons:
They are abundant in helium and hydrogen.They are hot and thick.They are highly gravitationally drawn.So, the correct options are A, D and E.
What is Nebulae?Huge clouds of gas and dust known as nebulae are found in space and are made up of heavier elements in the form of dust particles as well as ionized gases like hydrogen and helium.
Because the gases and dust within them have the potential to collapse under the influence of gravity and form new celestial objects, they are frequently the birthplace of stars and planetary systems. They are rich in hydrogen and helium. They have a strong gravitational pull and are hot and dense.
Hence, the correct options are A, D and E.
Learn more about Nebulae, here:
https://brainly.com/question/9497068
#SPJ5
Select all the correct answers. what are three reasons why nebulae contribute more to stellar formation than other regions of the universe?
they are rich in hydrogen and helium. they have an unlimited supply of hydrogen. they are far away from black holes. they are dense and hot. they have a strong gravitational pull.a 1.0857g sample of a compound containing only carbon, hydrogen, and oxygen was burned in excess oxygen gas. 3.190g of co2 and 0.9360g of h2o were produced. find the empirical formula of the compound
The empirical formula of the compound is C3H4O as the mole ratio is 3 : 4 : 1
1) Mass of carbon (C) in 3.190 g of carbon dioxide (CO₂)
atomic mass of C: 12.0107 g/mol
molar mass of CO₂: 44.01 g/mol
Setting up proportion as:
12.0107 g of C / 44.01 g of CO₂ = x / 3.190 g of CO₂
x = 0.87057 g of C
2) Mass of hydrogen (H) in 0.9360 g of water (H₂O)
atomic mass of H: 1.00784 g/mol
molar mass of H₂O: 18.01528 g/mol
Setting up proportion as:
2 × 1.00784 g of H / 18.01528 g of H₂O = x / 0.9360 g of H₂O
x = 0.10472 g of H
3) Mass of oxygen (O) in 1.0857 g of pure sample
Mass of O = mass of pure sample - mass of C - mass of H
Mass of O = 0.38397 g O ≈ 0.3840 g
4) Mole calculations
C: 0.87057 g / 12.0107 g/mol = 0.07248 mol
H: 0.10472 g / 1.00784 g/mol = 0.10390 mol
O: 0.3840 g / 15.999 g/mol = 0.02400 mol
So, to find empirical formula the mole ratios are:
C: 3
H: 4
O: 1
Thus the mole ratio is 3 : 4 : 1, and the empirical formula is: C3 H4 O
Learn more about empirical formula here:
https://brainly.com/question/14044066
#SPJ4
Click here to view a list of the common polyatomic ions. what is the formula for ammonium sulfate? nh4so4 na2so3 (nh4)2so4 na2so4
Option C ;(NH4)2SO4 is the formula for ammonium sulfate.
It is an inorganic salt. It appears as fine white crystals. Its molecular weight is 132.14g/mol. Its density is 1.77g/cm³.It has many commercial uses. It is mainly used as fertilizer for alkaline soils because ammonium ions forms small amounts of acid which lowers the pH of the soil.
It is acidic with pH of 5.5. Its melting point is 235 °C. it is soluble in water. It is obtained by the reaction of sulfuric acid with ammonia. Sulfuric acid will react with two equivalents of ammonia.
To know more about ammonium sulfate click here
brainly.com/question/2671989
#SPJ4
Answer:
C. (NH4)2SO4
And the second question is
A. KOH
Explanation:
When a hydrogen atom is covalently bonded to either oxygen, , or fluorine there will be an attraction between that hydrogen and a lone pair of on a nitrogen, oxygen, or fluorine atom on an adjacent molecule. This attraction is called a bond.
Answer:
The attraction is a hydrogen bonding.
Explanation:
Based on the information on intermolecular forces, when a Hydrogen is specifically bonded with a Nitrogen, Oxygen or Fluorine, their bonding is called a hydrogen bond.
Draw the electron configuration for a neutral atom of chlorine.
The electron configuration for a neutral atom of chlorine is 1s² 2s² 2p⁶ 3s² 3p⁵.
Atomic number of Chlorine is 17. to write the electronic configuration of chlorine we need to know the number of electrons in chlorine atom. the atomic number of chlorine is 17 therefore there are 17 electrons. the first two electron enter in 1s since s can hold only 2 electrons then next two electron will enter in 2s . the next six electrons will enter in 2p since p can hold six electrons . and next two electron in 3s now reaming 5 will enter in 3p. therefore the electron configuration for a neutral atom of chlorine is 1s² 2s² 2p⁶ 3s² 3p⁵.
Thus, the electron configuration for a neutral atom of chlorine is 1s² 2s² 2p⁶ 3s² 3p⁵
To learn more about electronic configuration here
https://brainly.com/question/14283892
#SPJ1
what is the result of applying too much sample to the tlc plate? select one: the sample leeches out into the elution solvent reduced separation between the spots some of the sample moves down instead of up the spot does not leave the origin the sample moves past the solvent front
Applying too much sample to the TLC (thin layer chromatography) plate results in reduced separation between the spots.
When performing thin layer chromatography it is necessary to not apply too much of the sample onto the plate. Once the elution solvent starts climbing up the plate, all the components of the sample will be separated along the plate according to the intensity of their interactions with the plate and the solvent (quantified as the Rf value - retention factor).
In a sample that is too concentrated or too much of it has been applied, the separation will be negatively affected because the huge spots originating from the sample components will overlap, making Rf determination difficult, if not impossible.
You can learn more about thin layer chromatography here:
brainly.com/question/13483325
#SPJ4
CAN someone please help me !!!!!!!!!!!
Yes, the motor would run faster because the increased electrical force increases the magnetic force in the motor. That is option B.
What are electrical forces?An electrical field is defined as the type of field that is surrounded by charged particles which may be negatively or positively charged.
A battery is an electron chemical cell that has the ability to generate electrical energy through chemical reaction in its cells.
A magnetic force is defined as the type of force generated through the action of moving electric charges or magnetic materials.
When the number of batteries in a circuit is being increased, there would be increase in the input voltage leading to an increase in the magnitude of the speed.
Therefore, the motor is expected to run faster because of the increased magnetic force of the motor which is caused by increase electrical force.
Learn more about magnetic field here:
https://brainly.com/question/26257705
#SPJ1
Atoms of the element sodium want to give up an electron because sodium atoms
Sodium is highly electropositive thus it can easily give out one electron from the outermost shell of the atom of the element.
Why does sodium give up an electron?We know that sodium is an element that has been found to be a member of group one of the periodic table. This implies that the sodium has only one electron in the outermost shell of the atom. As such, the sodium atom is quite very reactive and we observe that the sodium atom does loose electron easily.
The elements that are in the first group of the periodic table are highly electropositive and this is what informs the fact they have a tendency to loose electrons quickly.
When the sodium atom looses an electron, it forms a univalent positive ion and there is a loss of an entire shell and this is why we find out that sodium does not occur in a free sate in nature owing to the fact that it tends to react very much.
Learn more about sodium atom:https://brainly.com/question/1703949
#SPJ1
Select the correct answer. what is the chemical formula of magnesium bromide? a. mgbr2 b. mgbr c. mg2br2 d. mg2br
The correct chemical formula of magnesium bromide is MgBr₂.
Ionic bonds are formed by transfer of electrons between metal and non metals.
Electronic configuration of magnesium:
[Mg] :12 : 1s², 2s², 2p⁶, 3s²
Magnesium atom will lose two electron to gain noble gas configuration and form magnesium cation with +2 charge.
[Mg²⁺] : 1s², 2s², 2p⁶
Electronic configuration of bromine:
[Br] : 35 : 1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁵
Bromine atom will gain one electron to gain noble gas configuration and form bromide ion with -1 charge.
[Br⁻] : 36 : 1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶
In magnesium bromide, two electrons from metal gets transferred to bromine atom and thus form an ionic bond to give MgBr₂.
To know more about Ionic bond visit the link:
https://brainly.com/question/11527546?referrer=searchResults
#SPJ4
which of the following statements is false? gas molecules collide with each other without loss of energy. gas molecules collide with the container walls without loss of energy. the pressure of a gas at constant temperature in a sealed container will gradually decrease. because of the relationship between temperature and average molecular speed, the temperature of a gas would drop if energy were lost in collisions. friction does not slow down gas particles and cause them to stop moving.
The pressure of a gas at a constant temperature in a sealed container will gradually decrease. Option C.
Gases are made up of particles molecules or atoms in constant random motion. Gas particles constantly collide with each other and with the walls of the container. These collisions are elastic. That is, there is no net energy loss due to collision. The pressure of a constant temperature gas in a closed container gradually decreases.
The above statement is incorrect because the pressure of a gas at a constant temperature depends on the volume of the gas. If the container is sealed, the volume of gas is also constant. Collisions are completely elastic. When two molecules collide, they change direction and kinetic energy, but all kinetic energy is conserved. Collisions are not sticky. The average kinetic energy of gas molecules is directly proportional to absolute temperature.
Learn more about The pressure here:-https://brainly.com/question/25965960
#SPJ4
Due to the human extermination of prairie dogs in South Dakota, black footed ferrets became endangered in 1973. Only 18 ferrets were in existence in 1987. Rangers began a captive breeding program to increase their population numbers. The ferrets were later released in the Badlands and Wind Cave National Park in 2007.
Which type of conservation effort is this?
Responses
A. resource conservation
B. wildlife reintroduction
C.predator management
D.ecological introduction
The type of conservation effort which involves the captive breeding program to increase the population numbers of Ferrets is resource conservation and is denoted as option A.
What is Conservation?This is referred to as the process in which valuable resources which are present on earth such as plants, minerals etc are protected through various means by the appropriate authorities or individual.
Conservation helps to prevent dying out and extinction of species which is denoted in the captive breeding program to increase the population numbers of Ferrets so as to prevent the extinction of the animal hence option A was chosen.
Read more about Conservation here https://brainly.com/question/14840218
#SPJ1
PLEASE SOMEONE HELP EXPLAIN THIS IT’S DUE FIRST THING TMRW MORNING!!
Determine the empirical formula of a 28.00 gram sample containing 22.90 grams carbon and 5.10 grams hydrogen.
Answer:
CH3
Explanation:
Hope this helps :)
a cu2 standard solution was prepared by diluting 1.50 ml of 3.95 x 10-2 m cu2 stock solution to a total volume of 25.00 ml. what is the concentration of cu2 in the standard solution?
the concentration of cu2 in the standard solution is 2.37*10^-3 M
What is concentration ?
The amount of solute that has been dissolved in a specific volume of solvent or solution is measured by the solution's concentration. A solution that contains a significant amount of dissolved solute is said to be concentrated. A solution is said to be dilute if it only contains a little amount of dissolved solute.
V1S1 = V2S2
S2 = V1S1/V2 = ( 1.50*3.95*10^-2)/25 = 2.37*10^-3 M
the concentration of cu2 in the standard solution is 2.37*10^-3 M
To know about concentration from the link
https://brainly.com/question/17206790
#SPJ4
It is easier to separate liquids that have boiling points within a range of 5 degrees than it is liquids that have boiling points within a range of 10 degrees true or false?.
The given statement exists as false. The temperature at which a liquid's vapor pressure equals the pressure of the gas above it exists comprehended as the boiling point of the liquid.
What is meant by boiling point?The temperature at which a liquid's vapor pressure equals the pressure around it and the liquid transforms into a vapor is known as the boiling point of a substance. A liquid's boiling point varies depending on the atmospheric pressure in the area.
The temperature at which a liquid's vapor pressure equals the pressure of the gas above it exists comprehended as the boiling point of the liquid. The temperature at which a liquid's vapor pressure equals one atmosphere is considered the liquid's typical boiling point (760 torr).
The element with the lowest temperature at which an element would smolder is helium, and the element with the highest temperature is tungsten. The melting point is measured in degrees Celsius (C).
To learn more about boiling point refer to:
https://brainly.com/question/40140
#SPJ4
name the three hardest substances that were tested. To what classes of solids do these substances belong? What general feature do these three types of solids have in common
Three hardest substances that were tested is aluminum, silicon dioxide and sucrose and the classes of solids do these substances belong is metallic type of solid and general feature do these three types of solids have in common are melting point and hardness
Hardest substance are that cannot be crushed, cut distorted or scrapped readily and the hardness of a substance is dictated by its crystalline structure which is regular and the three three hardest substances that were tested is aluminum, silicon dioxide and sucrose
Three substances classes of solid are also same the classes of solids these substances belong is metallic type of solid and general feature are also same of solids have in common are melting point and hardness metallic solid means metal is a solid in which hard in the nature shiny and smooth and so many metals are too hard
Know more about solid
https://brainly.com/question/27699151
#SPJ1
6. Classify the following as physical changes (PC), chemical changes (CC), physical properties (PP), and chemical properties (CP):
a. __An iron scorches a shirt when you leave it in one spot too long.
b. __ The tires on your car seem to be getting low in very cold weather.
c. __ Your grandmother's silver tea set gets black with tarnish over time.
d. __ Spray-on oven cleaner converts grease in the oven into a soapy material.
e. __ An ordinary flashlight battery begins to leak with age and can't be recharged.
f. __ Acids produced by bacteria in plaque cause teeth to decay.
g. __ Sugar chars if overheated while making homemade candy.
h. __ Hydrogen peroxide fizzes when applied to a wound.
i. __ Dry ice "evaporates" without melting as time passes.
The classification of the given processes as either physical changes (PC), chemical changes (CC), physical properties (PP), and chemical properties (CP): is as follows:
CC An iron scorches a shirt when you leave it in one spot too long.PC The tires on your car seem to be getting low in very cold weather.CC Your grandmother's silver tea set gets black with tarnish over time.CP Spray-on oven cleaner converts grease in the oven into a soapy material.CC An ordinary flashlight battery begins to leak with age and can't be recharged.CP Acids produced by bacteria in plaque cause teeth to decay.CC Sugar chars if overheated while making homemade candy.CP Hydrogen peroxide fizzes when applied to a wound.PP Dry ice "evaporates" without melting as time passes.What are physical and chemical changes?Physical changes are changes that occur in a substance that are easily reversible and only affect the physical properties of that substance.
In physical changes, no new substances are formed.
Some physical properties that may change in physical changes are color, taste, volume, mass, physical state, etc.
Chemical changes are changes that occur in a substance that are not easily reversible and which affect the chemical properties of that substance.
In chemical changes, new substances are formed.
Some chemical properties that may change in physical changes are oxidation state, combustibility, etc.
Learn more about chemical and physical changes at: https://brainly.com/question/11370755
#SPJ1
Explain the difference between the first and second ionization energy of an element.
The difference between the first and second ionization energy of an element is second ionization energy is larger than first ionization energy.
Ionization energy is the energy required to remove the electron . First ionization energy is the amount of energy required to remove the electron from neutral atom such as M. while second ionization energy is the amount of energy required to remove electron from positively charged ion such as M⁺.
first ionization energy is given as :
M ---> M⁺ + e⁻ , IE1
second ionization energy is given as :
M⁺ ----> M²⁺ + e⁻ , IE2
Thus, The difference between the first and second ionization energy of an element is second ionization energy is larger than first ionization energy.
To learn more about ionization energy here
https://brainly.com/question/28385102
#SPJ1
the volume vv of an ideal gas varies directly with the temperature tt and inversely with the pressure pp . a cylinder contains oxygen at a temperature of 310310 degrees k and a pressure of 1818 atmospheres in a volume of 120120 liters. find the pressure if the volume is decreased to 9595 liters and the temperature is increased to 320320 degrees k.
The final pressure of the ideal gas is 23.47 atm.
We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation
P . V = n . R . T
where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.
From the question above, we know that
V1 = 120 L
P1 = 18 atm
T1 = 310 K
V2 = 95 L
T2 = 320 K
When the initial and final gas is the same, we can use the ratio of the ideal gas as
(P2 . V2) / (P1 . V1) = T2 / T1
(P2 . 95) / (18 . 120) = 320 / 310
P2 = 23.47 atm
Find more on ideal gas at: https://brainly.com/question/25290815
#SPJ4
do eukaryotic Cells have DNA found in the nucleus. True or false
5. What percent of CuCl₂ is Cu?
Answer: The mass percent of copper in copper chloride is 47.23 %.
Which principle did you apply in Step 4 of the
investigation?
Answer:
Find root causes.
Explanation:
i hope the answer be right
when given the symbol Cl-37, what is the mass and charge of this symbol?mass is 37 and charge is 37mass is 17 and charge is 37mass is 0 and charge is 0mass is 37 and charge is 17
Given the symbol Cl-37, the element is Cl, but there is no information about its charge. When this is like that, it is implicit it is an atom, that is, it is neutral, its charge is 0.
The number indicates is the mass number, so its mass is 37.
So, mass is 37 and charge is 0.
