Stoichiometry Practice

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O  

How many grams of O₂ will be needed to burn 36.1 g of B₂H₆?

• 13.8 g O₂
• 3.86 mol of O₂
• 124 g O₂

Tags

NGSS.HS-PS1-7

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂
How many grams of Al₂(SO₄)₃ would be formed if 250g H₂SO₄ completely reacted with aluminum?

• 0.85 g
• 290 g
• 450 g
• 870 g

Tags

NGSS.HS-PS1-7

For the reaction represented by the equation Cl₂ + 2KBr → Br₂ + 2KCl, how many grams of potassium chloride can be produced from 356 grams potassium bromide (KBr)?

• 749 g
• 225 g
• 479 g
• 814 g

Tags

NGSS.HS-PS1-7

Using the following equation:
4 NH₃ + 5 O₂ --> 4 NO + 6 H₂O
How many grams of oxygen gas are needed to react with 56.8 grams of ammonia (NH3)?

• 45.08 g O₂
• 133.33 g O₂
• 260.77 g O₂
• 75.92 g O₂

Tags

NGSS.HS-PS1-7

4NH₃ + 5O₂ → 4NO + 6H₂O
How many grams of NO are formed if 6.30g of ammonia react with 1.80g of oxygen? 

• 0.37g
• 0.045g
• 1.35g
• 11.1g

Tags

NGSS.HS-PS1-7

Using the pictured equation, how many moles of hydrogen can you make with 7.9 g Zn?

• .12 g
• .121 g
• 520 g
• 517 g

Tags

NGSS.HS-PS1-7

Using the balanced equation below,
 CaC₂(s)   +  2H₂O(l)   -->   C₂H₂(g)   +   Ca(OH)₂(aq)
how many grams of Ca(OH)₂ would be formed with 3.20 moles of CaC₂?

• 119 g
• 21.2 g
• 114 g
• 237 g

Tags

NGSS.HS-PS1-7

Given the following reaction  2NaClO₃--> 2NaCl + 3O₂ . How many grams of NaCl are produced when 80.0 grams of O₂ are produced?

• 500 g Nacl
• 96.7 g NaCl
• 6960 g of NaCl

Tags

NGSS.HS-PS1-7

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

• 6
• 2
• 3
• 1

Tags

NGSS.HS-PS1-7

Using the balanced equation

Mg(s)   +   2HCl(aq)  -->   MgCl₂(aq)   +   H₂(g)

How many grams of HCl are consumed by the reaction of 2.50 moles of magnesium?

• 5.00 g
• 7.29
• 182 g
• 218 g

Tags

NGSS.HS-PS1-7