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Chemistry
Amount of substances: The mole
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Created by
Priyana Sangha
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Cards (25)
What is the quantity used to measure the amount of substance?
The mole
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How many particles are in one mole?
6.02 ×
10<sup>23</sup>
particles
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What is the Avogadro constant?
It is the number of
particles
in a
mole
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How is the amount of substance measured?
In
moles
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What does one mole of any substance contain?
The same number of particles as
carbon-12
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What is the mass of 1 mole of an element equal to?
Its
relative atomic mass
in
grams
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How much does 1 mole of magnesium weigh?
24.3 g
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How much does 2 moles of magnesium weigh?
48.6 g
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What is the formula for calculating the amount of substance?
amount (
mol
) = mass (g) /
molar mass
(
g mol<sup>-1</sup>
)
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How do you calculate the amount of moles in 10 g of calcium?
amount = 10/
40
= 0.25 mol
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What is the molar mass of oxygen gas, O<sub>2</sub>?
32 g mol<sup>-1</sup>
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How many moles are in 16 g of oxygen gas?
0.5
mole
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What is the rearranged equation for molar mass?
molar mass = mass /
amount
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How do you calculate the number of atoms in 13.5 g of Al?
Calculate
moles
, then
particles
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What is the number of moles in 13.5 g of Al?
0.5
mol
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How do you calculate the number of particles from moles?
number of particles = amount ×
Avogadro
constant
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What is the number of particles in 0.5 mol of Al?
3.01 ×
10<sup>23</sup>
atoms
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How can molar mass be calculated using moles?
Using
mass and number of moles
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What is the molar mass of a substance if 0.114 g corresponds to 0.00200 mol?
57.0 g mol<sup>-1</sup>
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How do you calculate the molar mass of CaCO<sub>3</sub>?
40.1
+
12.0
+ (3 ×
16.0
)
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What is the molar mass of CaCO<sub>3</sub>?
100.1 g mol<sup>-1</sup>
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How many moles are in 15.0 g of CaCO<sub>3</sub>?
0.150
mol
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What is the molar mass of a substance?
The mass in grams of
1 mole
of the substance
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How is molar mass expressed?
In g
mol<sup>-1</sup>
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What is the relationship between molar mass and relative atomic mass?
They are the same expressed in
g mol<sup>-1</sup>
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