Moles and Molar Mass
What is the mass of 2 moles of water (H₂O)?
36 g
What volume (in dm³) does 1 mole of any gas occupy at room temperature and pressure?
22.4 dm³
How many atoms are there in 1 mole of any element?
6.02×10^23 atoms
In the reaction of hydrogen with oxygen, what is the mole ratio of hydrogen to water?
1:1
In the reaction: N₂ + 3H₂ → 2NH₃, what volume of hydrogen is required to react with 22.4 dm³ of nitrogen gas?
67.2dm³
How many moles are in 66 g of carbon dioxide (CO₂)?
1.5 moles
What is the volume of 0.5 moles of nitrogen gas (N₂) at room temperature and pressure?
11.2 dm³
How many molecules are in 2 moles of water?
1.204×10^24 molecules
For the reaction sodium with chlorine to form table salt, what is the mole ratio of sodium to chlorine?
2:1
In the reaction: N₂ + 3H₂ → 2NH₃, what volume of ammonia (NH₃) gas will be produced from 22.4 dm³ of nitrogen gas?
44.8 dm³
How many moles of sodium chloride (NaCl) are present in 117 g of NaCl?
2 moles
How many moles of oxygen gas (O₂) are in 33.6 dm³ at room temperature and pressure?
1.5 moles
How many oxygen atoms are there in 3 moles of O₂?
3.612×10^25 oxygen atoms
In the reaction: N₂ + 3H₂ → 2NH₃, how many moles of hydrogen are required to react with 2 mole of nitrogen?
6 moles
In the reaction: 2CO + O₂ → 2CO₂, what volume of carbon dioxide will be produced if 33.6 dm³ of carbon monoxide (CO) reacts with oxygen?
33.6 dm³
Calculate the number of moles in 200 g of glucose
1.11 moles
If 56 dm³ of hydrogen gas (H₂) is collected at room temperature and pressure, how many moles of gas are there?
2.5 moles
Calculate the number of carbon atoms in 0.5 moles of carbon dioxide
3.01×10^23 carbon atoms
In the equation: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O, if you start with 2 moles of propane (C₃H₈), what volume of carbon dioxide (CO₂) will be collected?
134.4dm3
How many moles of oxygen are needed to react completely with 44.8 dm³ of propane (C₃H₈) in the equation: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O?
10 moles
what is the volume of hydrogen gas produced when 2g of magnesium (Mg) reacts with excess hydrochloric acid (HCl)
1.87dm^3
5.00 g of calcium carbonate (CaCO₃) is heated to giveCO2 gas. what volume of gas is collected?
1.12 dm³
How many hydrogen atoms are there in 4 moles of methane (CH₄)?
9.648×10^24 hydrogen atoms
For the reaction: 4Fe + 3O₂ → 2Fe₂O₃, how many moles of iron(III) oxide (Fe₂O₃) will be produced if 56g of iron (Fe) are used?
0.5 moles
Hydrogen gas is produced by reacting zinc (Zn) with hydrochloric acid (HCl).If 6.54 g of zinc reacts completely, calculate the mass of hydrogen gas produced.
0.2g