Stoichiometry

CH₄ + 2O₂ --> 2H₂O + CO₂

What is the mass of CO₂ produced when 35g of O₂ reacts?

• 1.09 g

• 24.06 g

• 28.20 g

• 44.00 g

Tags

NGSS.HS-PS1-7

What is the limiting reactant if 42.2 g of N₂ reacts with 9.2 g of H₂?

N₂ + 3H₂ --> 2NH₃

• N₂

• H₂

• NH₃

• 3.07

Tags

NGSS.HS-PS1-7

2Na + 2H₂O → 2NaOH+ H₂

How many grams of hydrogen are produced if 120 g of Na are available?

• 5.23 g

• 2.69 g

• 690 g

• 45 g

Tags

NGSS.HS-PS1-7

Identify the limiting reagent when 6.00 g HCl combines with 5.00 g Mg to form MgCl₂.

Mg + 2HCl --> MgCl₂ + H₂

• Mg

• H₂

• MgCl₂

• HCl

Tags

NGSS.HS-PS1-7

Silver nitrate and sodium phosphate are reacted in equal amounts of 200 g each. How many grams of silver phosphate are produced?

3AgNO₃ + Na₃(PO₄) ---> Ag₃(PO₄) + 3NaNO₃

• 163.14 g

• 64.04 g

• 146.14 g

• 498.20 g

Tags

NGSS.HS-PS1-7

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)

12.00 moles of NaClO₃ will produce how many grams of O₂?

• 256 g of O₂

• 576 g of O₂

• 288 g O₂

• 5.43 g O₂

Tags

NGSS.HS-PS1-7

Lead nitrate can be decomposed by heating.  What is the % yield of the decomposition reaction if 7.4g Pb(NO₃)₂ are heated to give 4.1 g PbO?
2Pb(NO₃)_{2 (s)}→2PbO_(s)+4NO_2(g)+O_2(g)

• 82%
• 44%
• 56%
• 67%

Tags

NGSS.HS-PS1-7

The reaction of 25.0 g benzene, C₆H₆, with excess HNO₃ resulted in 21.4 g C₆H₅NO₂. What is the percentage yield?

C₆H₆ + HNO₃ → C₆H₅NO₂ + H₂O

• 100%

• 27.39%

• 54.29%

• 85.62%

Tags

NGSS.HS-PS1-7

Cl₂ + 2KBr → Br₂ + 2KCl

How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?

• 572.49 g

• 221.37 g

• 209.41 g

• 814.25 g

Tags

NGSS.HS-PS1-7

Fe₂O₃ + 3H₂ → 2Fe + 3H₂O
About how many grams of H₂O will be produced from 150 grams of Fe₂O₃? 

• 50 grams H₂O
• 60 grams H₂O
• 5000 grams H₂O
• 6000 grams H₂O

Tags

NGSS.HS-PS1-7