Stoichiometry Chemistry

What is the molar mass of C₆H₁₂O₆?

• 29.018 g/mol
• 180.156 g/mol
• 90.078 g/mol
• 58.036 g/mol

What is the molar mass of CH₄

• 16.043 g/mol
• 13.019 g/mol
• 32.086 g/mol
• 26.038 g/mol

2H₂   +   O₂    −−〉 2H₂O
How many moles of H₂O could be made from 8.3 moles H₂?

• 4.15 mol
• 8.3 mol
• 16.6 mol
• 74.04 mol

Tags

NGSS.HS-PS1-7

2H₂  +   O₂    −−〉 2H₂O
 How many grams of H₂O could be produced from 3.91 g O₂?

• 1.905 g
• 4.4 g
• 2.2 g
• 1.1 g

2 Fe₂O₃   +   3 C  −−〉  4 Fe   +   3 CO₂

If 38.1 g Fe₂O₃  are combined with 9.53 g C, what is the percent yield if you actually made 17.41 g Fe in the lab?

• 65.3 %
• 29.4 %
• 26.65 %
• 59.14 %

Tags

NGSS.HS-PS1-7

What is the molar mass of Ba(CN)₂

• 189.363 g/mol
• 163.345 g/mol
• 177.352 g/mol
• 175.356 g/mol

How many grams are in one mole of Oxygen gas

• 63.996 g/mol
• 7.999 g/mol
• 15.999 g/mol
• 31.998 g/mol

If you start with 3.88 x 10²⁴ atoms of Na and an excess of Cl₂, how many grams of NaCl should you get?
2Na   +   Cl₂ −−〉  2NaCl

• 377 g NaCl
• 6.45 g NaCl
• 753 g NaCl
• 188 g NaCl

Tags

NGSS.HS-PS1-7

Mole ratios are obtained from the

• balanced chemical equation
• periodic table
• molar mass

Tags

NGSS.HS-PS1-7

Stoichiometry is based on the law of conservation of

• charge
• mass
• reactants
• volume

Tags

NGSS.HS-PS1-7