MOLE
PATROL
PATROL
What is Avogadro’s number?
6.02 x 1023
What is the molar mass of hydrogen gas (H₂)?
2.00 g/mol
How many atoms are in one mole of aluminum?
6.02 x 1023 atoms
A recipe calls for 1 mole of sugar (C₆H₁₂O₆). How many grams should you use?
180 g
A measurement is recorded as 0.000567000 m. How many significant figures does it have?
6 sig figs
A mole of carbon atoms contains how many atoms?
6.02 x 1023 atoms
How many grams are in 3.00 moles of NaCl?
175 g
Convert 2.50 moles of sulfur (S) to atoms.
1.51 x 1024 atoms
A balloon is filled with 2.00 moles of helium gas. How many helium atoms are inside?
1.20 x 1024 atoms
A compound has a total mass of 50 g, and it contains 20 g of oxygen. What is the percent composition of oxygen?
40%
How many moles are in 1.204 × 10²⁴ molecules of water?
2.00 moles
If you have 88.0 g of CO₂, how many moles do you have?
2.00 moles
What is the volume of 2.00 moles of oxygen gas (O₂) at STP?
44.8 L
If a gold necklace contains 0.250 moles of gold, how many atoms of gold does it have?
1.51 x 1023 atoms
The density of a gas is 1.43 g/L at STP. What is its molar mass?
32 g/mol
If you have 3.50 moles of oxygen gas (O₂), how many molecules do you have?
2.11 x 1024 molecules
How many grams are in 0.250 moles of calcium carbonate (CaCO₃)?
25.0 g
A sample of nitrogen gas (N₂) occupies 67.2 L at STP. How many moles of nitrogen gas are present?
3.00 moles
If a can of soda contains 40 g of CO₂, how many moles of CO₂ are present?
1 moles
What is the percent composition of hydrogen in water (H₂O)?
11%
If one helium atom has a mass of 4.00 amu , what is the mass of one mole of helium atoms in grams?
4.00 g
A sample contains 0.0750 moles of sulfur dioxide (SO₂). What is its mass?
5 g
A sample of nitrogen gas (N₂) contains 3.01 × 10²³ molecules. What is its volume at STP?
33.6 L
A sample of salt (NaCl) weighs 58 g. How many molecules of NaCl are in the sample?
6.02 x 1023 molecules
A gas has a density of 2.86 g/L at standard conditions. Calculate its molar mass.
64 g/mol