Moles and Molar Mass - AP Chemistry
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What is the molar mass of C₂H₄?
What is the molar mass of C₂H₄?
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28.05 g/mol. C = 12.01, H = 1.01: $(2 \times 12.01) + (4 \times 1.01)$
28.05 g/mol. C = 12.01, H = 1.01: $(2 \times 12.01) + (4 \times 1.01)$
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How is moles of a substance calculated from mass?
How is moles of a substance calculated from mass?
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Moles = mass / molar mass. Divides mass by molar mass for conversion.
Moles = mass / molar mass. Divides mass by molar mass for conversion.
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What is the formula for number of particles?
What is the formula for number of particles?
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Particles = moles $\times$ Avogadro's number. Converts moles to individual particles.
Particles = moles $\times$ Avogadro's number. Converts moles to individual particles.
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State Avogadro's number.
State Avogadro's number.
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$6.022 \times 10^{23}$. The number of particles in one mole.
$6.022 \times 10^{23}$. The number of particles in one mole.
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What is the molar mass of KCl?
What is the molar mass of KCl?
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74.55 g/mol. K = 39.10, Cl = 35.45: $39.10 + 35.45$
74.55 g/mol. K = 39.10, Cl = 35.45: $39.10 + 35.45$
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What is the molar mass of H₂O?
What is the molar mass of H₂O?
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18.02 g/mol. H = 1.01, O = 16.00: $(2 \times 1.01) + 16.00$
18.02 g/mol. H = 1.01, O = 16.00: $(2 \times 1.01) + 16.00$
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Find the number of moles in 90 g of C₂H₅OH.
Find the number of moles in 90 g of C₂H₅OH.
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1.96 moles. 90 g ÷ 46.08 g/mol = 1.96 mol
1.96 moles. 90 g ÷ 46.08 g/mol = 1.96 mol
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What is the definition of a mole in chemistry?
What is the definition of a mole in chemistry?
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A mole is $6.022 \times 10^{23}$ particles of a substance. Fundamental unit of chemical quantity.
A mole is $6.022 \times 10^{23}$ particles of a substance. Fundamental unit of chemical quantity.
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Find the mass of 3 moles of HCl.
Find the mass of 3 moles of HCl.
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109.5 grams. 3 mol × 36.5 g/mol = 109.5 g
109.5 grams. 3 mol × 36.5 g/mol = 109.5 g
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How many moles are in 100 grams of NaOH?
How many moles are in 100 grams of NaOH?
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2.5 moles. 100 g ÷ 40.00 g/mol = 2.5 mol
2.5 moles. 100 g ÷ 40.00 g/mol = 2.5 mol
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What is the molar mass of NH₃?
What is the molar mass of NH₃?
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17.03 g/mol. N = 14.01, H = 1.01: $14.01 + (3 \times 1.01)$
17.03 g/mol. N = 14.01, H = 1.01: $14.01 + (3 \times 1.01)$
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What is molar mass?
What is molar mass?
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The mass of one mole of a substance, in g/mol. Connects mass to amount of substance.
The mass of one mole of a substance, in g/mol. Connects mass to amount of substance.
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Convert 3 moles of Na to grams.
Convert 3 moles of Na to grams.
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68.97 grams. 3 mol × 22.99 g/mol = 68.97 g
68.97 grams. 3 mol × 22.99 g/mol = 68.97 g
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Calculate number of molecules in 2 moles of CO₂.
Calculate number of molecules in 2 moles of CO₂.
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$1.204 \times 10^{24}$ molecules. 2 mol × $6.022 \times 10^{23}$ = $1.204 \times 10^{24}$
$1.204 \times 10^{24}$ molecules. 2 mol × $6.022 \times 10^{23}$ = $1.204 \times 10^{24}$
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How many grams are in 0.5 moles of NaCl?
How many grams are in 0.5 moles of NaCl?
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29.22 grams. 0.5 mol × 58.44 g/mol = 29.22 g
29.22 grams. 0.5 mol × 58.44 g/mol = 29.22 g
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How is moles of a substance calculated from mass?
How is moles of a substance calculated from mass?
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Moles = mass / molar mass. Divides mass by molar mass for conversion.
Moles = mass / molar mass. Divides mass by molar mass for conversion.
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What is the molar mass of NaCl?
What is the molar mass of NaCl?
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58.44 g/mol. Na = 22.99, Cl = 35.45: $22.99 + 35.45$
58.44 g/mol. Na = 22.99, Cl = 35.45: $22.99 + 35.45$
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How many molecules in 0.25 moles of H₂O?
How many molecules in 0.25 moles of H₂O?
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$1.506 \times 10^{23}$ molecules. 0.25 mol × $6.022 \times 10^{23}$ = $1.506 \times 10^{23}$
$1.506 \times 10^{23}$ molecules. 0.25 mol × $6.022 \times 10^{23}$ = $1.506 \times 10^{23}$
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Determine moles in 4.5 grams of H₂.
Determine moles in 4.5 grams of H₂.
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2.23 moles. 4.5 g ÷ 2.02 g/mol = 2.23 mol
2.23 moles. 4.5 g ÷ 2.02 g/mol = 2.23 mol
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Calculate the moles in 32 grams of O₂.
Calculate the moles in 32 grams of O₂.
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1 mole. 32 g ÷ 32.00 g/mol = 1 mol
1 mole. 32 g ÷ 32.00 g/mol = 1 mol
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What is the molar mass of CH₄?
What is the molar mass of CH₄?
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16.04 g/mol. C = 12.01, H = 1.01: $12.01 + (4 \times 1.01)$
16.04 g/mol. C = 12.01, H = 1.01: $12.01 + (4 \times 1.01)$
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Calculate mass of 2 moles of H₂SO₄.
Calculate mass of 2 moles of H₂SO₄.
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196.16 grams. 2 mol × 98.08 g/mol = 196.16 g
196.16 grams. 2 mol × 98.08 g/mol = 196.16 g
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How many atoms are in 1 mole of carbon?
How many atoms are in 1 mole of carbon?
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$6.022 \times 10^{23}$ atoms. One mole contains Avogadro's number of atoms.
$6.022 \times 10^{23}$ atoms. One mole contains Avogadro's number of atoms.
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How many moles are in 18 grams of water?
How many moles are in 18 grams of water?
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1 mole. 18 g ÷ 18.02 g/mol = 1 mol
1 mole. 18 g ÷ 18.02 g/mol = 1 mol
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State Avogadro's number.
State Avogadro's number.
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$6.022 \times 10^{23}$. The number of particles in one mole.
$6.022 \times 10^{23}$. The number of particles in one mole.
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What is the molar mass of KCl?
What is the molar mass of KCl?
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74.55 g/mol. K = 39.10, Cl = 35.45: $39.10 + 35.45$
74.55 g/mol. K = 39.10, Cl = 35.45: $39.10 + 35.45$
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What is the formula for number of particles?
What is the formula for number of particles?
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Particles = moles $\times$ Avogadro's number. Converts moles to individual particles.
Particles = moles $\times$ Avogadro's number. Converts moles to individual particles.
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How many moles are in 18 grams of water?
How many moles are in 18 grams of water?
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1 mole. 18 g ÷ 18.02 g/mol = 1 mol
1 mole. 18 g ÷ 18.02 g/mol = 1 mol
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Find the number of moles in 90 g of C₂H₅OH.
Find the number of moles in 90 g of C₂H₅OH.
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1.96 moles. 90 g ÷ 46.08 g/mol = 1.96 mol
1.96 moles. 90 g ÷ 46.08 g/mol = 1.96 mol
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How many atoms are in 1 mole of carbon?
How many atoms are in 1 mole of carbon?
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$6.022 \times 10^{23}$ atoms. One mole contains Avogadro's number of atoms.
$6.022 \times 10^{23}$ atoms. One mole contains Avogadro's number of atoms.
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