Particles
How many molecules are present in 2 moles of water (H2O)?
2 moles × 6.022 × 10^23 molecules/mole = 1.2044 × 10^24 molecules
In the equation:
2H₂ + O₂ → 2H₂O
What is the mole ratio of H₂ to H₂O?
2:2 (or 1:1)
Is this equation balanced?
H₂ + O₂ → H₂O
no
What is the mass of 1 mole of Oxygen gas?
32 g
What is the molar mass of NaCl?
58.44 g/mol
Convert 4.00 × 10^23 molecules of CO2 to moles.
4.00 × 10^23 ÷ 6.022 × 10^23 = 0.664 moles
In:
N₂ + 3H₂ → 2NH₃
How many moles of H₂ are needed to make 2 moles of NH₃?
3 moles of H2
Balance:
___ Al + ___ O₂ → ___ Al₂O₃
4 Al + 3 O₂ → 2 Al₂O₃
How many grams are in 2 moles of CO₂?
88 g
What is the molar mass of H₂O?
18 g/mol
You have 1.5 moles of O2 gas. How many O2 molecules are there?
1.5 moles × 6.022 × 10^23 molecules/mole = 9.033 × 10^23 molecules
In:
2KClO₃ → 2KCl + 3O₂
How many moles of O₂ are produced from 2 moles of KClO₃?
3 moles O2
__ Na₃PO₄ + ___ MgCl₂ → ___ NaCl + ___ Mg₃(PO₄)₂
2 Na₃PO₄ + 3 MgCl₂ → 6 NaCl + Mg₃(PO₄)₂
How many moles are in 22 g of CO₂
.5 moles
What is the molar mass of Ca(NO₃)₂?
164 g/mol
How many moles are in 3.01 × 10^24 atoms of sodium (Na)?
3.01 × 10^24 ÷ 6.022 × 10^23 = 5.00 moles
In:
2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
How many moles of CO₂ are formed from 2 moles of C₂H₆?
4 moles
2KClO₃ → ?
2KCl + 3O₂
What is the mass of 0.75 moles of NaOH?
30 g
What is the molar mass of Al₂(SO₄)₃?
342 g/mol Al₂(SO₄)₃
If you have 0.25 moles of ammonia (NH3), how many molecules do you have?
0.25 moles × 6.022 × 10^23 molecules/mole = 1.506 × 10^23 molecules
4NH₃ + 5O₂ → 4NO + 6H₂O
How many moles of O₂ are needed to react with 8 moles of NH₃?
10 moles O2
C₃H₈ + O₂ → ?
Then Balance.
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
How many grams are in 1.25 moles of CaCO₃?
125 g CaCO3
What is the molar mass of (NH₄)₂SO₄
132 g/mol (NH₄)₂SO₄