Stoichiometry

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

Using the following equation:
Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron can be made from  6 moles H₂? 

• 4 moles Fe
• 6 moles Fe
• 9 moles Fe
• 2 moles Fe

How many grams are in 7.8 moles of NaCl?

• 476grams
• 460 grams
• 456 grams
• 462 grams

2CO  +  O₂ → 2CO₂
How many moles of carbon dioxide are produced from 10 moles of carbon monoxide (CO)?

• 10
• 20
• 1
• 5

Tags

NGSS.HS-PS1-7

4 Al + 3 O₂ –> 2 Al₂O₃  How many moles of  aluminum would be needed to completely react with 45 grams of O₂?

• 1.05 moles
• 3.75 moles
• 1.875 grams
• 1.875 moles

Tags

NGSS.HS-PS1-7