Molar Mass
What is the molar mass of Al(OH)3?
78 g/mol
How many grams is equal to 1 mole of NaCl?
58 g
If you have 18 grams of water (H₂O), how many moles do you have?
1 mol
What is the molecular formula of a compound with a molar mass of 180 g/mol and an empirical formula of CH₂O?
C6H12O6
If the balanced equation is 2 H₂ + O₂ → 2 H₂O, what is the mole ratio of hydrogen to water?
2:2
Calculate the molar mass of carbon dioxide (CO₂).
44 g/mol
How many grams make up 2.5 moles of sodium chloride (NaCl)?
146.1 g
Is 24 g of NaOH greater than, less than, or equal to 1 mole?
less than
If a compound contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen, what is its empirical formula?
CH₂O
What is the mole ratio between hydrogen and sodium in the reaction: 2Na + 2H2O → NaOH + H2?
1:2
Calculate the molar mass of calcium hydroxide, Ca(OH)₂.
74.10 g/mol
How many grams are in 2.0 moles of CO₂?
88 g
How many moles are in 29.2 g of NaCl?
0.50 mol
Which compound is in its empirical form?
C7H7
CF4
C6H12O6
CF4
N2+3H2→2NH3, If you have 6 moles of hydrogen gas (H₂), how many moles of ammonia (NH₃) can be produced?
4 mol
What is the molar mass of magnesium phosphate, Mg₃(PO₄)₂?
262.85 g/mol
How many grams are in 0.50 moles of NaCl?
29.2 g
How many moles are in 34.0 g of NH₃?
2.00 mol
What is the empirical formula of a compound?
An empirical formula represents the simplest whole-number ratio of atoms in a compound
2Al+3Cl2→2AlCl3
How many moles of chlorine gas (Cl₂) are needed to completely react with 4 moles of aluminum (Al)?
6 mol
Find the molar mass of calcium carbonate (CaCO₃)
100.09 g.mol
How many grams are in 1.5 moles of NH₃?
25.5 g
How many moles are in 50.0 g of CaCO₃?
0.50 mol
A compound has a molar mass of 90g/mol and empirical formula of HCO2. What is the molecular formula?
C2H2O4
Consider the balanced equation:
N2+3H2→2NH3
If 6.0 moles of H₂ react completely, how many moles of NH₃ are produced?
4 mol HN3