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What is the molar mass of Mg(NO₃)₂

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

How many grams are in 7.8 moles of NaCl?

• 476grams
• 460 grams
• 452 grams
• 462 grams

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

• 6
• 2
• 3
• 1

What is the mole ratio in the following reaction:
2CO  +  O₂  → 2CO₂

• 2:1:2
• 1:1:1
• 1:2:1
• Have no clue what a mole ratios is!!

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

• 6 moles Fe
• 4 moles Fe
• 2 moles Fe
• 1 moles Fe

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

• 10
• 20
• 1
• 5

N₂ +  3H₂ → 2NH₃ 
How many moles of hydrogen are needed to react with 5 moles of nitrogen?

• 6
• 2
• 3
• 15

2Na + 2H₂O → 2NaOH+ H₂
How many grams of hydrogen are produced if 120 g of Na are available?

• 5.2 g
• 2.6 g
• 690 g
• 45 g

 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

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

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