Because boiling point is independent of liquid volume, the boiling point would not vary.
What is boiling point ?
A liquid's boiling point changes depending on the pressure being applied; the normal boiling point is the temperature at which the vapor pressure is equal to the average atmospheric pressure at sea level (760 mm [29.92 inches] of mercury). Water boils at sea level at 100° C.
The temperature at which a liquid's vapor pressure equals the pressure around it and the liquid turns 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 boiling point of a liquid is lower in a partial vacuum than it is at atmospheric pressure. A liquid's boiling point is lower under low pressure than it is under air pressure. As a result, water boils at 99.97 °C (211.95 °F) at sea level but at 93.4 °C (200.1 °F) at 1,905 m (6,250 ft) altitude under standard pressure. Various liquids will boil at different temperatures at a given pressure.
Because boiling point is independent of liquid volume, the boiling point would not vary.
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the average distance from Earth to thr moon is 384,000 kilometers. How long does it take for light to the go from Earth to the moon?
for one second you travel 300,000 kilometers.
Answer:
Explanation:
About 1.3 seconds
It takes light about 1.3 seconds to travel from the moon to the Earth at a distance of 384000 km. This is because the speed of light is about 300000 km/s. So, it takes light about 1.3 seconds to travel from the moon to the Earth.
What are different types of forces and how do they act on objects?
help me please!
What pressure will be required for neon at 30°C to have the same density as nitrogen at 20°C and 1.0 atm?
Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, the pressure that will be required for neon at 30°C to have the same density as nitrogen at 20°C and 1.0 atm is 1.44atm.
What is ideal gas equation?
Ideal gas equation is the mathematical expression that relates pressure volume and temperature. There is no force of attraction between the particles.
Mathematically the relation between Pressure and temperature can be given as
P₁M₁=DRT₁
P₂M₂=DRT₂
Rearranging the two equation we get
P₁M₁÷T₁=P₂M₂÷T₂
where,
P = pressure
M= Molarity
D=density
T =temperature
R = Gas constant = 0.0821 L.atm/K.mol
Substituting all the given values, we get
(P₁×M₁)÷T₁=(P₂×M₂)÷T₂
(P₁×20)÷303=(1.0 ×28)÷293
P₁=1.44atm
Therefore, the pressure that will be required for neon at 30°C to have the same density as nitrogen at 20°C and 1.0 atm is 1.44atm.
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Why is reactivity with oxygen a chemical property?
The reactivity of a substance with oxygen is a chemical, not a physical property. The reason it is called a chemical property is that it relies on its electron configuration to determine how it behaves around other substances.
What is a chemical property?A chemical property is a property of any material that becomes apparent during or after a chemical reaction; that is, any quality that can only be determined by changing the chemical properties of a substance.
Oxygen is a very reactive element, is highly paramagnetic and readily combines with other elements. One of the most important chemical properties of oxygen is that it promotes combustion. Even at room temperature, oxygen binds to elements and forms e.g. rust.
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QUESTION 1How many molecules of C6H12O6 are in 200. grams of C6H1206?
To find the number of molecules we must apply for Avogadro's number. This number tells us that in one mole of any substance there are 6.022x10^23 molecules. So the first thing we will do is find the moles contained in 200 grams of C6H12O6 (Glucose).
The molar mass of glucose is 180.06g/mol. So, the moles of glucose will be:
[tex]molC_6H_{12}O_6=givengC_6H_{12}O_6\times\frac{1molC_6H_{12}O_6}{MolarMass,gC_6H_{12}O_6}[/tex][tex]molC_6H_{12}O_6=200.gC_6H_{12}O_6\times\frac{1molC_6H_{12}O_6}{180.06gC_6H_{12}O_6}=1.11molC_6H_{12}O_6[/tex]Now, we apply for Avogadro's number. So, the molecules of glucose will be:
[tex]\begin{gathered} moleculesC_6H_{12}O_6=givenmolC_6H_{12}O_6\times\frac{6.022\times10^{23}molecules}{1molC_6H_{12}O_6} \\ moleculesC_6H_{12}O_6=1.11molC_6H_{12}O_6\times\frac{6.022\times10^{23}molecules}{1molC_6H_{12}O_6} \\ moleculesC_6H_{12}O_6=6.68\times10^{23}molecules \end{gathered}[/tex]Answer: In 200 grams of C6H12O6 there are 6.68x10^23 molecules
you can find the specific gravity of a substance by dividing its density by
Density of a substance is the ratio of its mass to volume. Specific gravity of the substance is the ratio of its own density to the density of water. Thus, dividing its density by density of water.
What is specific gravity?Specific gravity of an object is the ratio of its density to the density of water. In fact it is related to the gravity itself in water. This ratio determines whether the object float or sink to the bottom of water.
If the specific gravity is greater than one, which means the object is denser than water and it will sink to the bottom of water because of its weight. If the specific gravity is less than one, then the object have less density than water and it will float on water.
All the floating objects have a specific gravity of less than one. Irrespective of the weight of the objects they floats because of their higher density than water.
Ice floats on water where a stone will sink. Similarly large ships, canoes etc are floating because of their smaller specific gravity. This way we can compare the floating property using specific gravity.
Therefore, specific gravity of a substance can be found by dividing its density by the density of water.
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Explain how to make one liter of a 1.25 N sodium hydroxide solution.
Answer:
1.25 moles(N) of NaOH are present in 1000 gm of water.
and 1000gm = 1L
hence we need to put 1.25 Moles (N) of NaOH in 1L H2Owhy there is only one sodium ion for every chlorine ion, while there are two potassium ions for every oxygen ion?
There is only one sodium ion for every chlorine ion due to its valency.
The number of electrons that an atom needs to lose or gain in order to achieve a stable electron configuration i.e the octet of an element is known as the valency of an element, which serves as a gauge of that element's potential for combining.
The valency of Sodium (Na) is 1 and that of chlorine (Cl) is also one. therefore they combine to form a stable compound. The same rule follows in the compound formed by Potassium (K) and Oxygen(O) also. The valency of oxygen is 2 which means that it should be surrounded by 2 potassium ions to provide electrons to fulfill both the elements' octets.
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calculate the vapor pressure of a solution of 0.300 mol fraction of toluene and 0.700 mol fraction of cyclohexane at 32oc and determine whether the solution will boil. the vapor pressure of pure toluene is 40.2 torr and that of cyclohexane is 125 torr at 32oc
The Vapour pressure of the solution is 99.56 torr
The saturated vapour pressure of the solution maybe lower then the pressure of pure solvent in solution. It is equal to the vapour pressure of the pure solvent at the same temperature scaled by mole fraction of solvent stated by Rault's Law.
P(solution) = mol fraction of solvent × P° ( solvent)
given, pressure of pure toulene = 40.2 torr
pressure of pure cyclohexane = 125 torr
∴ P (solution) = 0.3 × 40.2 + 0.7 × 125
P (solution) = 99.56 torr
hence, vapour pressure is calculated to be 99.56 torr.
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currently, the heaviest alkaline earth metal is radium (atomic number 88). if we ever discover/synthesis them, what will be the atomic numbers of the next two alkaline earth metals?
Atomic number. should be 120.
due to.... a/q
Alkaline earth metals are part of the eighth group and are known to exist in two groups.
Consequently, the element's atomic number will be 120.
What is meant by atomic number?The quantity of protons in an atom's nucleus is known as the atomic number. An element's identity is determined by its proton count (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
A chemical element's atomic number is its position in the periodic system, which places the elements in ascending order of the number of protons in their nuclei. As a result, the atomic number is also determined by the number of protons, which is always equal to the number of electrons in a neutral atom.
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under normal conditions, the exhaust gas from a well controlled coal burning power plant contains 12 ppmv sulfer dioxide (so2. the exhaust into the atmosphere has a temperature of 100c, determine the concentration of so2 emitted on a hg/m3 basis
The concentration of so2 emitted on a hg/m3 basis is 0.01 M.
Concentration is the abundance of a constituent divided through the full extent of an aggregate. several styles of mathematical description can be distinguished: mass attention, molar awareness, range attention, and quantity attention.
Given the 5 ppmv SO2 and we need to calculate the concentration of SO2 emitted on a µg /m3 basis.
We know,
mg/m3 = ppmv * M/0.08205*T
M = molecular weight of gas = 64.064 g/mol
mg/m3 = 5 ppmv *64.064 g.mol-1/ 0.08205 * 273.15 K
= 14.28 mg/m3
Now we know
1 mg = 1000 µg
So, 14.258 mg =?
= 14280 µg/m3
We are given partial pressure. P = 0.1 atm.
Henry’s law constant = 0.1 mole/(liter.atm)
C = Kh*P
= 0.10 mol/L.atm * 0.10 atm
= 0.01 mol/L
= 0.01 M
So, the equilibrium concentration of a gas in water is 0.01 M.
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question related to relative atomic mass
please show the working!
Answer:
Element XX has a relative atomic mass of 6.86 aum
Explanation:
See attached worksheet.
Question 5(Multiple Choice Worth 2 points)
(14.01 LC)
What is the function of the outer covering in fish?
Answer:
Protects the fish from their environment.
Explanation:
Fish have a mucus on their outer covering that is very slimy and slippery; this serves as a benefit for the fish that will allow it to swim more easily in water.
It also works as a little suit of armor for the fish to protect themselves against predators.
which is a difference between butyne and cyclobutyne? group of answer choices cyclobutyne does not exist. butyne's multiple bond is interior, cyclobutyne is not between interior carbons. cyclobutyne burns much hotter than butyne because of the greater unsaturation. both b and c are differences between the molecules.
Cyclobutyne does not exist. A hydrocarbon molecule called cyclobutyne has a triple bond inside of a ring with four carbon atoms.
Due to its high ring strain, this cycloalkyne is extremely unstable and hasn't been isolated in its purest form.
What is butyne ?Organic compound butyne has the chemical formula HC2CH2CH3. It is a flammable, colourless gas. 1-Butyne takes part in processes that are common for terminal alkynes, such as hydrogenation, condensation with formaldehyde, and alkyne metathesis.
Due of its extremely low torsional barrier and the difficulty in identifying it using high-resolution infrared spectroscopy, 2-butyne is of interest to physical chemists.
Cycloalkenes include cyclobutene. It offers potential for research but no immediate applications. It is an effortlessly condensible colourless gas. In a contemporary synthesis, cyclobutanol is dehydrated twice. The ammonium salt OH was first thermolyzed to create the chemical.
Cycloalkanes are monocyclic saturated hydrocarbons in organic chemistry. To put it another way, all of the carbon-carbon bonds in a cycloalkane's structure are single and it only contains hydrogen and carbon atoms grouped in a configuration with a single ring.
When a cycloalkane has more than 20 carbon atoms, it is often referred to as a cycloparaffin. The isomers of alkenes make up all cycloalkanes.
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Nothing like cyclobutyne exists. Cyclobutyne, a hydrocarbon molecule, features a triple bond inside of a ring made up of four carbon atoms. This cycloalkyne hasn't been isolated in its purest form because of its high ring strain, which makes it very unstable.
Describe butyne.?Butyne is an organic molecule with the formula HC2CH2CH3, according to chemistry. It is a flammable, colorless gas. 1-Butyne takes part in processes that are typical for terminal alkynes, such as hydrogenation, condensation with formaldehyde, and alkyne metathesis.
Because of its very low torsional barrier and the difficulty in locating it using high-resolution infrared spectroscopy, 2-butyne is of interest to physical chemists.
One of the cycloalkenes is cyclobutene. Although it might be studied, there are currently no applications in real life. It is an easily condensable colorless gas. In a contemporary synthesis, cyclobutanol passes through two stages of dehydration. The ammonium salt OH was first thermolyzed to create the chemical.
In organic chemistry, cycloalkanes are monocyclic saturated hydrocarbons. To put it another way, a cycloalkane has single carbon-carbon bonds throughout its whole structure.
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Which set of numbers will balance the following equations? 1's have been included for clarity.__Mn3N4 + __NaF --> __MnF4 + __Na3N a 1; 4; 1; 4 b 1; 4; 3; 2 c 1; 12; 3; 4 d 3; 2; 3; 2
ANSWER
Option C
EXPLANATION
Given that;
[tex]\text{ ----- Mn}_3N_4\text{ }+\text{ ---- NaF }\rightarrow\text{ ---- MnF}_4\text{ }+\text{ ---Na}_3N[/tex]In the reaction above, we have the following data
At the reactants side;
3 atoms of manganese
4 atoms of nitrogen
1 atom of sodium
1 atom of fluorine
At the products side
1 atom of manganese
4 atoms of fluorine
3 atoms of sodium
1 atom of nitrogen
To balance the above equation, apply the law of conservation mass
Law of conservation of mass states that matter can neither be created nor destroyed but can e transformed from one formato another.
To balance the equation, 1 mole of Mn3N4 reacts with 12 moles of Na Tto give 3 moles of MnF4 and 4 moles of Na3N
So, the new equation becomes
[tex]\text{ Mn}_3N_4\text{ }+\text{ 12NaF }\rightarrow\text{ 3MnF}_4\text{ }+\text{ 4Na}_3N[/tex]The following data can be deduced in the above equation
At the reactants side
3 atoms of Mn
4 atoms of N
12 atoms of Na
12 atoms of F
At the products side
3 atoms of Mn
12 atoms of F
12 atoms of Na
4 atoms of N
Looking atthe vabove data, the number of atoms of each element at the reactants side is equal to the number of atoms of same elements at the products side.
Hence, the correct answer is option Ce
u
what type of hydrogen atoms (primary, secondary, tertiary aliphatic. primary, secondary, tertiary benzylic. aromatic) are found in the following compounds: a) tert-butyl benzene b) cyclohexane c) ethylbenzene d) toluene e) isopropyl benzene
Answer: Benzylic hydrogen refer to the hydrogen atoms attached to the carbon atom just next to the benzene group. In ethyl benzene carbon next to benzene has two hydrogen atoms only.
Explanation: For example, among the inorganic compounds, oxides contain O 2− ions or oxygen atoms, hydrides contain H − ions or hydrogen atoms, sulfides contain S 2− ions, and so forth.
To find the order of a reaction with respect to one reactant, you will monitor the __________ as the _________of ________ is changed.
To find the order of a reaction with respect to one reactant, you will monitor the Percentage as the reactant of product is changed.
To determine the reaction order from experimental data, either the differential rate law or the integrated rate law can be used. In the rate law, the exponents are frequently positive integers: 1 and 2 or even 0. As a result, the reactions in each reactant are of zeroth, first, or second order. Changes in the concentration of the reactants or products can be used to calculate the rate. changes in reactant or product mass or volume If the reaction is the result of multiple reaction steps with different orders, the order of the reaction can be changed by adjusting the reagent concentration. Because the order is often ruled by the slowest reaction, you can manipulate the relative reaction speed by varying the concentrations.
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Answer:
Explanation:
You will watch the Percentage when the reactant of the product is changed in order to determine the sequence of a reaction with respect to one reactant.
Either the differential rate law or the integrated rate law can be used to infer the reaction order from experimental data.
The exponents of the rate law are frequently positive numbers, such as 1 and 2 or even 0.
Because of this, each reactant undergoes reactions of the zeroth, first, or second order.
The rate can be calculated using changes in the concentration of the reactants or products.
A change in the reactant, product, or reactant's volume by changing the reagent concentration, the reaction order can be modified if it involves several steps that have been performed in a different sequence.
You can also control the relative reaction speed by changing the concentrations because the order is frequently determined by the slowest reaction.
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CAN someone please help me !!!!!!!!
The balloon and the comb definitely have the same electrical charge. Option 2.
Like charges repelAccording to the law of attraction in physics, like charges repel while unlike charges attract.
Going by this law:
positive and positive will repelnegative and negative will repelpositive and negative will attract.In other words, if 2 objects that have the same charges are brought close to each other, there will be a repulsion. If the 2 objects are of different charges, there will be an attractive force between them.
The students observed that the comb repelled the balloon. The implication is that the comb and the balloon are of the same charge.
This is logical considering the fact that both objects were rubbed against hair. They got their charges during the process of rubbing. An electrostatic force is generated that moves electrons from the hair to the two objects.
Thus, both the balloon and the comb are negatively charged and will, therefore, repel each other.
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N₂(g) + 3H₂(g) 2NH₂(g)
(iv) Name the catalyst used in this industrial process.
Answer:
I catalyst promoter is the answer
please help tommorow exam. ill give brainly. please explain this
Explanation:
from the equation, we can understand that the mixture of these two substances formed a solid precipitate(Pbl2) which was yellow and a colourless liquid( 2KNO3)Try and visualize yellow cute particles dancing in a colourless liquid and you are trying to remove them from itJust like sieving rice from water, u use a filter paper to sieve them from the liquidOnce you pass the solution through the filter paper the solid particles won't pass through but remain on the filter paper. This will now be called filtrate while the liquid remaining is the residueFiltration is a seprating technique used for mixture containing liquid an solid precipitatesBest of luck in your exams!!!selective analysis of an analyte and internal standard yielded detector responses of 3.47 and 5.23 respectively when each had a concentration of 1.00 ppm. five ml of an unknown analyte solution were mixed with 1 ml of 5.00 ppm internal standard and then diluted to a total of 10 ml. the detector responses for analyte and internal standard for this mixture were 4.26 and 2.43. calculate the concentration of the analyte in the unknown solution. report your answer in ppm.
By calculating the response factor for the internal standard first, we can calculate that the concentration of the unknown analyte sample is 2.64 ppm.
When solving problems like this, we need to calculate the appropriate response factor:
A(X) / C(X) = F * A(S) / C(S)
A(X) - response for the analyte (3.47)
C(X) - concentration of the analyte (1 ppm)
F - response factor
A(S) - response for the internal standard (5.23)
C(S) - concentration of the internal standard (1 ppm)
F = A(X) * C(S) / (C(X) * A(S)
F = 3.47 * 1 ppm / (5.23 * 1 ppm)
F = 0.663
Now we can use this in the second calculation to obtain the concentration of the analyte in the sample. One thing to note is that in second measurement 1 mL of a 5.00 ppm internal standard was diluted to 10 mL, so the concentration of the internal standard is actually 5.00 ppm / 10 = 0.500 ppm.
4.26 / C(X) = 0.663 * 2.43 / 0.500 ppm
C(X) = 4.26 * 0.500 ppm / (0.663 * 2.43)
C(X) = 1.32 ppm
Because 5 mL of the analyte solution were diluted to 10 mL, the concentration is actually 2 * 1.32 ppm = 2.64 ppm.
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in a beaker, 0.57 mol of potassium iodide and 0.52 mol of lead (ii) nitrate are dissolved in water. a reaction occurs, and a white precipitate is observed. calculate the mass (in grams) of the precipitate formed
The white precipitate formed is lead iodide (PbI₂) of mass 131.38g
What is a precipitate reaction?The term "precipitation reaction" may be described as "a chemical response taking place in aqueous solution wherein ionic bonds integrate to shape an insoluble salt". These insoluble salts fashioned in the course of precipitation reactions are referred to as precipitates. Precipitation reactions are normally double displacement reactions with the formation of stable residues referred to as precipitates.
One of the first-class examples of precipitation reactions is the chemical response among potassium chloride and silver nitrate, which precipitates stable silver chloride. This is an insoluble salt fashioned as a made from precipitation reactions. The chemical components for this precipitation response is proven below.
AgNO3(aqueous) + KCl(aqueous) —–AgCl(precipitate) + KNO3(aqueous)
For the given case,
The balanced reaction is as follows:
Pb(NO₃)₂ (aq) + 2KI (aq) → 2KNO₃ (aq) + PbI₂ (s)
This tells us that for every mole of lead iodide (PbI₂) produced, it requires 2 moles of potassium iodide (KI).
If you have 0.57 mole of KI, they will produce: 0.57/2 = 0.285 mol of PbI₂
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
mass of lead iodide (PbI₂) = Number of moles × molar mass
Mass of lead iodide = 0.285 × 461.01
Mass of lead iodide = 131.38g
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how does the synthesis of mendelevium differ from that of californium?
Mendelevium and californium , both synthesize differently because Mendelevium is a synthetic element and californium is a radioactive chemical element.
What is mendelevium and californium and how do they synthesize?Mendelevium is metallic radioactive transuranium element . It is in the actionoid that is in the actinide series.Mendelevium is an element which was produced by the cyclotron and was all night experiment.Doing the same for longer period of time produces thousands of mendelevium atoms.Californium are made by firing helium nuclei at curium-242, and this process yield the isotope californium-245 .Californium-245 has a half live of 44 minutes and was initially produced 5000 atoms of californium.To know more about californium visit:
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Which element has 2 valence electrons and 5 energy levels?
Answer:
its Boron i hope this helped.
Explanation:
What number helps us identify the element?
Answer:
The Atomic Number
Explanation:
The atomic number is the number of protons of an atom in its nucleus.
Each element has a unique atomic number.
(view screenshot too, to find where it is in element table)
Help me to balance this equation please
Answer:
H202(aq)+2Fe2+(aq)+2H+=>2fe3+(aq)+2H20(l)
Explanation:
H202(aq)+2Fe2+(aq)+2H+=>2fe3+(aq)+2H20(l)
H202(aq)+2Fe2+(aq)+2H+=>2fe3+(aq)+2H20(l)
two mole of ideal gas is compressed isothermal from 10 to 10,000 atmospheric pressure at 500 degree kelvin. calculate the entropy change in the process.
Two mole of ideal gas is compressed isothermal from 10 to 10,000 atmospheric pressure at 500 degree kelvin then the entropy change in the process is -114.86 J/K
Ideal gas is the hypothetical gas composed of molecule which follow a some rules in that ideal molecule do not attract or repel to each other and here given data is
Ideal gas = 2 mole
Pressure = P₁ = 10
Pressure = P₂ = 10,000
Temprature = 500 degree kelvin
We have to calculate entropy change in the process =?
We know the entropy change
ΔS = cv ln(T₂/T₁) +nR ln (P₂/P₁)
For isothermal compression temprature constant,
ΔS = nR ln (P₂/P₁)
ΔS = 2×8.314×ln(10/10,000)
ΔS = -114.86 J K⁻
ΔS = -114.86 J/K
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why does bread grow mold more quickly at room temperature than in the refrigerator? why does bread grow mold more quickly at room temperature than in the refrigerator? the formation of mold is an endothermic process, and low temperatures favor endothermic processes. because of the absence of sunlight, the potential energy of the reactants is lower in the refrigerator. more reactants will have the energy necessary to proceed to products at room temperature than at refrigerator temperatures. the formation of mold is an example of a photochemical process, and it cannot occur in a dark place such as a refrigerator.
Bread grows mold more quickly at room temperature than in the refrigerator because more reactants will have the energy necessary to proceed to products at room temperature than at refrigerator temperatures.
Molds are formed on bread due to various reactions that facilitate the living of the molds on the bread and allow them to reproduce on the bread.
However, as molds are living organisms characterized as fungi, they need enzymes for function.
The enzymes and proteins normally function best at room temperature. On the other hand, when the temperatures are low, such as that of a refrigerator the molds will not have enough energy because the proteins and enzymes will be inactivated. Hence, molds grow on bread quickly at room temperature as compared to bread in a refrigerator.
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The table gets its shape from the of the atoms
O properties
O odor
O color
O size
a sample of gas occupies a volume of 70.3 ml . as it expands, it does 140.6 j of work on its surroundings at a constant pressure of 783 torr . what is the final volume of the gas?
A sample of gas occupies a volume of 70.3 ml as it expands, it does 140.6 j of work on its surroundings at a constant pressure of 783 torr and the final volume of the gas is 11.12L
A gas is a sample of matter that conforms to the shape of a container in which it is held and acquires a uniform density inside the container and even in the presence of gravity and regardless of the amount of substance in the container
Here given data is 11.12L
V₁ = Initial volume = 70.3 ml = 0.0703ml = (1L=1000ml)
w = 140.6 J = 1.387 J = (1Latm=101.3J)
Pressure = 783 torr = 1.03 atm = (1atm=760 torr)
V₂ = final volume = ?
1.387Latm = 1.03 atm × (V₂ - 0.0703ml)
(V₂ - 0.0703ml) = 11.05
V₂ = 11.12L
The final volume of the gas is 11.12L
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