Electrons and proton are a type of subatomic particle with a negative and positive charge. Protons are held together in the atom's nucleus by the nuclear force. A subatomic particle without charge is the neutron.
What are electrons give example?The electron, the smallest constituent part of an atom, has a negative charge. Protons and electrons are present in an atom in a neutral state in an equal number. One electron and one proton are all that the hydrogen ion has. On the other hand, the atomic nucleus possesses 92 protons, that means 92 electrons.
Where are electrons found?Electrons are present outside of the atom's nucleus, in contrast to neutrons and protons that are contained inside the nucleus at its center. Negative electrons are drawn to the positively charged nucleus so because electric charges of opposite sign attract one another.
To know more about Electron visit:
https://brainly.com/question/1255220
#SPJ13
how do atoms form a new substance? responses by sharing electrons with each other by sharing electrons with each other by losing electrons by losing electrons by gaining electrons from each other by gaining electrons from each other by losing neutrons to each other
By exchanging electrons with one another, atoms create new materials. When two atoms share at least one pair of electrons, this is known as a covalent link. Ionic bonds form when positive are attracted to one another and share an electron as a consequence.
What does joining atoms to create new compounds and sharing electrons have in common?When two atoms share , they establish a connection. Because the two positively charged atomic nuclei and shared, negatively charged electrons in a covalent bond are attracted to one another by electrostatic forces, the bond is stable.
One or more pairs of electrons from each atom are shared by the other atoms to form a covalent link. The two atomic nuclei are pulling these electrons in opposite directions. When the gap between two atoms' electronegativities is too narrow for an electron transfer to take place and form ions, a covalent bond is created.
Reactants interact with one another in a chemical reaction, breaking the bonds that hold their atoms together.
Learn more about covalent bond refer
https://brainly.com/question/3447218
#SPJ14
Answer:
Here's your answer on the Image!
Explanation:
I took the K-12 Quiz
if the rate of reaction increases by a factor of 9.6 when the concentration of reactant increases by a factor of 3.1, what is the order of the reaction with respect to this reactant?
If the rate of reaction increases by a factor of 9.6 when the concentration of reactant increases by a factor of 3.1 then order of the reaction with respect to this reactant is 1/3
Rate of reaction is the speed at which a chemical reaction proceeds
Here given data is
Rate of reaction = 9.6
Concentration of reactant = 3.1
We have to calculate order of the reaction = ?
So we can write
R = K[C]ⁿ
Where R is the reaction rate and K is a constant
Here C is the concentration of the reactant
rate of reaction increases by a factor of 9.6 when the concentration of reactant increases by a factor of 3.1 then
9.6 = K× [3.1]ⁿ
Dividing this equation we get
1/9.6 = 1/3.1ⁿ
3n = 1
n = 1/3
Then the order of the reaction with respect to this reactant is 1/3
Know more about order of the reaction
https://brainly.com/question/11873694
#SPJ1
2NaOH + CO₂ = Na₂CO3 + H₂O
Is this equation balanced?
Balanced chemical equation :
A balanced equation is a chemical reaction equation in which the total charge and the number of atoms for each element in the reaction are the same for both the reactants and the products.
Given Equation :
[tex]2NaOH_{}[/tex] + [tex]CO_{2}[/tex] = [tex]Na_{2}CO_{3}[/tex] + [tex]H_{2}O[/tex]
Here, we have 2 sodium (Na) atoms, 4 Oxygen (O) atoms, 2 Hydrogen (H) atoms and 1 Carbon (C) atom on the left hand side of the equation (reactants).
Also we have 2 sodium (Na) atoms, 4 Oxygen (O) atoms, 2 Hydrogen (H) atoms and 1 Carbon (C) atom on the right hand side of the equation (products).
Hence , the given equation, [tex]2NaOH_{}[/tex] + [tex]CO_{2}[/tex] = [tex]Na_{2}CO_{3}[/tex] + [tex]H_{2}O[/tex] is a balanced chemical equation.
To know more about balanced chemical equations, visit,
https://brainly.com/question/14072552
#Balanced chemical equations
I have four questions:
1- what can you say about the number of protons in these three metals as you look down in the group. (lithium, sodium, and potassium.)
2- what can you say about the mass number of the three metals.(lithium, sodium, and potassium.)
3- what is similar about the structures of an atom of lithium and an atom of sodium?
4- what is similar about the structures of lithium sodium and potassium?
The number of protons in lithium is 3, in sodium is 11 and in potassium is 19 whereas the mass number of lithium is 6.941 u, the mass number of sodium is 22.989769 u and the mass number of potassium is 39.0983 u.
What is the mass number of lithium, sodium, and potassium?Numbers of Protons:
The total number of protons in lithium is 3.
The total number of protons in sodium is 11.
The total number of protons in potassium is 19.
Mass Number:
The mass number of lithium is 6.941 u.
The mass number of sodium is 22.989769 u.
The mass number of potassium is 39.0983 u.
Structure of Lithium and Potassium:
Lithium and potassium have a similarity in them that they all have one electron in their outermost orbit.
Structure of Sodium and Potassium:
Sodium and potassium have a similarity in them that they all have one electron in their outermost orbit.
So we can conclude that the number of protons in lithium is 3, in sodium is 11 and in potassium is 19.
Learn more about Proton here: https://brainly.com/question/1805828
#SPJ1
What could happen if the global temperature rises just a few degrees?
Answer:
most things would melt
Explanation:
such as glaciers and ice caps in the arctic and Antarctic, causing many floods etc.
ur welcome
is CL3 a compound element or mixture
Answer:
Elements
Explanation:
I'll assume that the correct element symbol is Cl, not CL. CL would mean a compound made up of one carbon (C) and one Unknown element (L), Cl means chlorine.
I aslo wonder if the compound is [tex]Cl_{2}[/tex] and not [tex]Cl_{3}[/tex]. Regardless, both would be elements. A compound is made up of 2 or more different elements. A mixture is 2 or more compounds.
A chemist has a block of aluminum metal (density is 2.7 g/mL). The block weighs 1.9 g. What is the volume, in mL, of the aluminum block?
Answer: v = 0.70 ml
Explanation:
1. We can use the Density equation
(d = density (g/ml), m = mass (g), v = volume (ml))
D = m/v
2. Plug in what we have and solve for v.
2.7 = 1.9/v
v = 0.70 ml
helium condenses to a liquid at 4.224 k under atmo- spheric pressure and remains a liquid down to the abso- lute zero of temperature. (it is used as a coolant to reach very low temperatures.) the vapor pressure of liquid helium at 2.20 k is 0.05256 atm. calculate the volume occupied by 1.000 mol helium vapor under these condi- tions and compare it with the volume of the same amount of helium at standard temperature and pressure.
If we assume that helium acts as an ideal gas, we can calculate that 1.000 mol of it will take up 3.43 L, which is 6.53 times less than its volume at standard conditions.
Assuming that helium behaves like an ideal gas in both cases, we can calculate the volume at 2.20 K using the ideal gas equation:
PV = nRT
P - the pressure exerted by the gas (0.05256 atm)
V - the volume of the gas
n - number of moles of the gas (1.000 mol)
R - universal gas constant (0.08206 L*atm/K*mol)
T - temperature (2.20 K)
If we rearrange the equation, we get:
V = nRT/P
Now we plug in the known values:
V = 1.000 mol * 0.08206 L*atm/K*mol * 2.20 K / 0.05256 atm
V = 3.43 L
At standard conditions (273 K, 1 atm), 1 mol of an ideal gas has a volume of 22.4 L, so the volume at described conditions is 22.4 L / 3.43 L = 6.53 times smaller than at standard conditions.
You can learn more about ideal gas behavior here:
brainly.com/question/14934878
#SPJ4
Indicate the acid-base pairs for each of the following reactions:a) HClO3 + H2O <=> H3O + + ClO3-b) HSeO4 - + NH3 <=> NH4 + + SeO4 2-C) HCO3- + OH - <=> CO3 2- + H2OD) C5H5NH + + H2O <=> C5H5N + H3O+
Acid - base pairs.
Arrhenius theory, says, that acids are substances that dissociate in water to yield electrically charged atoms or molecules, called ions, one of which is a hydrogen ion (H+), and that bases ionize in water to yield hydroxide ions (OH−).
It is now known that the hydrogen ion cannot exist alone in water solution; rather, it exists in a combined state with a water molecule, as the hydronium ion (H3O+). In practice the hydronium ion is still customarily referred to as the hydrogen ion.
----------------------------------------------------------------------------------------------------------------
a) HClO3 + H2O <=> H3O + + ClO3-
HClO3 is the acid, ClO3- is the base (acid-base pair)
H2O acepts that H+ from the HClO3, and becomes H3O+
H2O is a base, H3O+ is the acid (acid-base pair)
----------------------------------------------------------------------------------------------------------------
b) HSeO4 - + NH3 <=> NH4 + + SeO4 2-
Here HSeO4 - can free one H so it would be the acid, and SeO4 2- is the base.
NH3 receives H+ from acid, so it is the base, and NH4+ is the acid.
---------------------------------------------------------------------------------------------------------------
c) HCO3- + OH - <=> CO3 2- + H2O
HCO3- gives away one H, so it is the acid, and CO3 2- is the base
(HCO3-,CO3 2-) acid-base pair.
OH- receives the H+ and becomes H2O. OH- is the base and H2O acid.
H2O can be acid and base, remember that. In this case it is the acid.
---------------------------------------------------------------------------------------------------------------
d) C5H5NH + + H2O <=> C5H5N- + H3O+
C5H5NH has the H, but on the right it doesn't, so it would be th acid. C5H5N- is the base.
H2O here is a base, because it receives the H+, and becomes H3O+ (the acid).
---------------------------------------------------------------------------------------------------------------
Q2.
This question is about the reaction between hydrogen sulfide (H₂S) and oxygen.
The equation for the reaction is:
2 H₂S(g) + 3 O₂(g) → 2 H₂O(g) + 2 SO₂(g)
(a) What does H₂O(g) represent?
(b) Calculate the volume of oxygen required to react with 50 cm³ of hydrogen sulfide.
Volume=
cm³
Answer:
q2
Explanation:
Both the reactants are gases at STP.
Equation:
2H2S + 302 → 2SO2 + 2H2O
As per this equation 2 moles (2 x 22.4 L) of H2S
need 3 moles (3 x 22.4 L) of oxygen for their
complete oxidation.
So, volume of oxygen needed for 2.8 L of H2S =
(2.8 x 3 x 22.4)/(2 x 22.4) = 4.2 L (answer)
(a) H₂O(g) represents water in the gaseous state. It is produced as a product of the reaction between hydrogen sulfide (H₂S) and oxygen (O₂).
What is gaseous state?Gaseous state refers to a substance existing as a gas. When a substance is in the gaseous state, its particles are not closely packed together like in a solid or liquid state. Instead, they are spread out and move freely, filling the available space.
(b) To calculate the volume of oxygen required to react with 50 cm³ of hydrogen sulfide, we need to use the stoichiometry of the reaction. From the balanced equation, we can see that the molar ratio between hydrogen sulfide (H₂S) and oxygen (O₂) is 2:3.
Given: Volume of hydrogen sulfide (H₂S) = 50 cm³
Using the molar ratio, we can set up the following proportion: 2 mol H₂S / 3 mol O₂ = 50 cm³ H₂S / x cm³ O₂
To find the volume of oxygen, we can solve for x:
x = (50 cm³ H₂S * 3 mol O₂) / 2 mol H₂S
Now, we need to convert the obtained moles of oxygen to volume using the ideal gas law. Since the volume is given in cm³, we can assume that the temperature and pressure are constant at standard conditions (typically 0°C and 1 atm).
Using the ideal gas law equation: PV = nRT
Assuming constant temperature and pressure, we can rearrange the equation as: V = (n * R * T) / P
Substituting the values: V = (moles of O₂ * 22.4 L/mol) / (1 atm)
Calculate the moles of O₂ using the obtained value from the proportion.
Finally, convert the volume from liters to cm³ by multiplying by 1000.
Learn more about gaseous state at:
https://brainly.com/question/5496865
#SPj2
The patient has a bone density of 1200mg/cm^3 what is the mass of 39.5cm^3 sample
Answer:
47,400 mgExplanation:
The mass of the bone sample can be found by using the formula
mass = density × volume
From the question
density = 1200mg/cm^3
volume = 39.5cm^3
We have....
mass = 1200 × 39.5 = 47400
We have the final answer as
47,400 mgHope this helps you
what is the purpose of using the Bohr model? what does this model shows . ?
i need helppp bro
Answer:
The purpose of a Bohr model is to show the atom(s) as a central nucleus; containing protons and neutrons with the electrons in circular orbitals at specific distances from the nucleus.
Explanation:
Have a great rest of your day
The one and only,
-Mr. Universe
In 1913 Bohr proposed his model of the atom , it's purpose was to explain how electrons can have stable orbits around the nucleus. It shows electrons orbiting the nucleus of an atom -He found that electrons farther away from the nucleus have more energy, meaning the electrons that are closer to the nucleus have less energy.
For example...(shows Bromine )
(you can give that gentleman up top brainliest)
aufbau states that you must fill the lowest energy orbital available before you can fill the next, but we have observed that atoms will fill their 4s orbitals before filling their 3d orbitals. how can we explain this?
Aufbau states that you must fill the lowest energy orbital 3d before 4s but we fill 4s before 3d because 3d orbitals have slightly more energy than 4s orbitals.
In atomic theory and quantum mechanics, an atomic orbital is a feature describing the location and wave-like conduct of an electron in an atom. This feature may be used to calculate the possibility of locating any electron of an atom in any specific location across the atom's nucleus.
An atomic orbital is a mathematical term in atomic concept and quantum mechanics that describes the location and wavelike behavior of an electron in an atom. Most of the electrons, each with its own spin quantum quantity s, will occupy every one of these orbitals.
Orbital holds electrons that range in an asset called spin. Orbital: A area of space within an atom in which an electron in a given subshell can be found. Any orbital can preserve most of the 2 electrons with contrary spin. the primary shell has one 1s orbital and holds 2 electrons.
Learn more about atomic orbitals here:-https://brainly.com/question/20319149
#SPJ4
the amount of iron in an iron ore can be quantitatively determined by titrating a solution of the unknown with a standard solution of dichromate. the net ionic equation is: redox titration.gif the titration of 25.0 ml of an iron(ii) solution required 18.0 ml of a 0.150 m solution of dichromate (cr2o72-) to reach the equivalence point. what is the molarity of the iron(ii) solution?
According to the given statement The molarity of the iron(II) solution is 0.648 M.
What is molarity?The amount of the sample in a specific solution volume is defined as its molarity (M). The molarity of a solute per litre of a solution is known as molarity. The molar concentration is yet another name for molarity.
Briefing:Iron(II) solution volume (V₁) = 25.0 mL/0.025 L
Dichromate solution (V₂) has a volume of 18.0 mL, or 0.018 L.
Dichromate solution molarity (M₂) = 0.150 M
Molarity of dichromate solution is :
M₂ = n₂/V₂
(n₂ = M₂* V₂ = 0.150 * 0.018 = 2.7 * 10⁻³ mol
Complete balanced equation is given below.
[tex]6 \mathrm{Fe}^{2+}(a q)+\mathrm{Cr}_2 \mathrm{O}_7^{2-}(a q)+14 \mathrm{H}^{+}(a q) \rightarrow 6 \mathrm{Fe}^{3+}(a q)+2 \mathrm{Cr}^{3+}(a q)+7 \mathrm{H}_2 \mathrm{O}[/tex]
It is obvious from the equation that 1 mole of dichromate is needed to make 6 moles of iron(II) solution.
Therefore, we calculate the number of moles of iron(II) solution using the unitary technique.
1 mole of dichromate is equal to 6 moles of iron (II)
6n₂ moles of iron are equal to n₂ moles of dichromate (II)
=6 * 2.7 * 10⁻³ = 0.0162 mol Fe²⁺
So, 0.0162 moles of iron(II) is needed. Therefore,
Now, molarity of iron(II) solution is given as: n[tex]_1[/tex] = 0.0162
Molarity = Moles ÷ Volume
M₁ = n[tex]_1[/tex]/V₁
M₁ = 0.0162mol/0.025 L = 0.648 M
The molarity of the iron(II) solution is 0.648 M.
To know more about Molarity visit:
https://brainly.com/question/8732513
#SPJ4
The complete question is -
The titration of 25.0 mL of an iron(II) solution required 18.0 mL of a 0.150M solution of dichromate to reach the equivalence point. What is the molarity of the iron(II) solution?
5 In what direction does the Sun appear to
move across the sky?
West to east
North to south
East to west
South to north
West to east direction the Sun appear to move across the sky.
The correct option is West to east.
Briefing:The Sun, Moon, planets, and stars all rise in the east and travel westward across the sky because Earth rotates or spins in an eastward direction.
What is the easiest way to identify directions?Start by pointing your left arm in the direction of the sun in the morning to get a sense of where north, south, east, and west are. Caitlin Dempsey is pictured. Now extend your right hand in the direction of the west. Your back is to the north and you are now looking south.
How many main directions are there?The four principal compass directions are known as the four cardinal directions, or cardinal points. They are north, east, south, and west, and are typically represented by the initials N, E, S, and W, respectively.
To know more about Direction visit:
https://brainly.com/question/28836995
#SPJ13
What is the density of an object with a mass of 17.6g and a volume of 6 mL
Answer: 3.6 ml
Hope this helps!
4.00 g of solid sodium hydroxide is added to water to make a solution with a concentration of
0.200 mol/ dm3
What is the volume of water used?
The volume of water used is 500cm^3.
The volume of water used.
NaOH concentration in mol/dm^3=NaOH concentration in g/dm^3/molar mass of NaOH.
M of NaOH=23+16+1=40
M=40 g/mol
0.2mol= concentration of NaOH in g/dm^3/40g/mol
=0.2mol/dm^3*40g/mol
=8g/dm^3
we know that,
1dm^3=1000cm^3
4.00g of NaOH will be dissolved in 4g*1000cm^3/8g
=500cm^3 of water
So, the volume of water used is 500cm^3.
Learn more about problems on the volume of water.
https://brainly.com/question/28817564
Answer:
20cm³
Explanation:
Volume = Molarity*number of moles
number of moles = Mass given/Molar mass
number of moles= 4.00g/40.0g
number of moles= 0.1mols
thus:
Volume= 0.200mol/dm³*0.1mol
Volume= 0.02dm³(20cm³)
