6.d Stoichiometry Mixed Practice

What is the molar mass of Fe₃(PO₄)₂

• 823.8g/mol
• 357.5 g/mol
• 455.6g/mol
• 86.3g/mol

6CO₂ + 6H₂O --> C₆H₁₂O₆ + 6O₂ 
What is the total number of moles of water needed to make 2.5 moles of C₆H₁₂O₆?

• 2.5
• 6
• 12
• 15

Tags

NGSS.HS-LS1-6

NGSS.HS-PS1-2

What is the mole ratio of H₂O to H₃PO₄ in the following chemical equation?   P₄O₁₀ + 6 H₂O --> 4 H₃PO₄ 

• 6:4
• 4:6
• 1:3
• 3:1

Tags

NGSS.HS-PS1-7

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

• 749 g

• 223 g

• 479 g

• 814 g

Tags

NGSS.HS-PS1-7

How many moles of Zn will be formed if 32.0 g of Cu is used as a reactant?

2 Cu+ Zn(NO₃)₂--> Zn + 2 Cu(NO₃)

• 0.25 moles Zn

• 0.504 moles Zn

• 0.75 moles Zn

• 1:2

Tags

NGSS.HS-PS1-7

• 2.79

• 7.44 mol

• 5.58 mol

• 3.72 mol​

Tags

NGSS.HS-PS1-7

C₂H₅OH + 3 O₂ --> 2 CO₂ + 3 H₂O

If 65.7 liters of O2 react, how many liters of CO₂ should be produced?

• 65.7 liters

• 43.8 liters

• 32.85 liter

• 98.55 liters

Ca₃(PO₄)₂ + 3 Na₂S = 3 CaS + 2 Na₃PO₄
How many grams of Ca₃(PO₄)₂ would need to react in order to produce exactly 5.67x10²⁴ particles of Na₃PO₄?

*This is a particle to gram problem (work it just like a gram to gram problem, but your given will be in particles)

• 1460 g

• 732 g

• 1830 g

• 457 g