Stoichiometry mass to mass class check_3

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

• 3mol Mg / 2 mol Fe
• 2 mol Mg/ 3 mol Fe
• 1 mol Fe/ 2 mol Fe
• 3 mol MgO / 2 mol Fe

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)?

• 749 g
• 223 g
• 479 g
• 814 g

Tags

NGSS.HS-PS1-7

Given the reaction: 6 Mg + P₄ → 2 Mg₃P₂

500g of P₄ react with some magnesium. How many grams of Mg₃P₂ are produced?

• 134870 grams
• 1089 grams
• 272 grams
• 230 grams 

Tags

NGSS.HS-PS1-7

Given the reaction: 6 Mg + P₄ → 2 Mg₃P₂

How many grams of Mg are needed in order to produce 1200 grams of Mg₃P₂?

• 53.4 grams
• 72.1 grams
• 87516 grams
• 649 grams

Tags

NGSS.HS-PS1-7