Balancing Chemical Reactions, Moles, Stoichiometry

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

• 6
• 2
• 3
• 1

2H₂   +   O₂  →  2H₂O
How many moles of water can be produced if 8 moles H₂ are used?

• 4 moles
• 8 moles
• 16 moles
• 2 moles

Given the equation:
2NaClO₃ (s) → 2NaCl (s) + 3O₂ (g) 
 
2.00 moles of NaClO₃ will produce how many grams of O₂? (mass of O₂ = 32g/mol)

• 56 g of O₂
• 96 g of O₂
• 64 g O₂

Tags

NGSS.HS-PS1-7

What is the mass of 2 moles of propane (C3H8)?  (C=12 g/mol; H = 1 g/mol)

• 44 g
• 88 g
• 22 g
• 13 g

Tags

NGSS.HS-PS1-7

What is the molar mass of C₆H₁₂O₆?

• 180.18
• 180.12
• 180.24
• 180.06

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

Tags

NGSS.HS-PS1-7

What is the molar mass of Mg(NO₃)₂

• 148.313g/mol
• 134.306g/mol
• 54.311g/mol

Calculate the molar mass of Mg(OH)_2.

• 33.2 g/mol
• 41.3 g/mol
• 86.9 g/mol
• 58.3 g/mol

Cl₂ + 2KBr → Br₂ + 2KCl
How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?

• 749 g
• 223 g
• 479 g
• 814 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