Stoichiometry

Front

Mole ratios are obtained from the

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balanced chemical equation

Front

What is the mole ratio of H₂O to H₃PO₄ in the chemical equation P₄O₁₀ + 6 H₂O --> 4 H₃PO₄?

Back

6:4

Front

Balance the reaction: CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)

Back

1,2,1,1

Front

How many particles are in 13.5 grams of Beryllium? Options: 1.5 particles, 9 particles, 4x10²³ particles, 9x10²³ particles

Back

9x10²³ particles

Front

When 12 moles of O₂ reacts with 1.1 mole of C₁₀H₈, what is the limiting reactant? C₁₀H₈ + 12 O₂ --> 10 CO₂ + 4 H₂O

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Oxygen

Front

N₂ +  3H₂ → 2NH₃ 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?

Back

6

Front

Name the following compound: SnO₂

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tin(IV)oxide

Front

What is the percent by mass of oxygen in MgO? Options: 20%, 40%, 50%, 60%

Back

40%

Front

What is the percent by mass of magnesium in MgO? Options: 20%, 40%, 50%, 60%

Back

60%

Front

Percent composition by mass of sulfur in MgSO₄ (gram formula mass = 120 g/mol)? Options: 20%, 27%, 46%, 53%

Back

27%