Stoichiometry Alt

Which is the correct mole ratio of K₃PO₄ to KNO₃ in the chemical reaction:
Mg(NO₃)₂ + K₃PO₄ → Mg₃(PO₄)₂ + KNO₃

• 1:1
• 2:3
• 1:3
• 1:2

Tags

NGSS.HS-PS1-7

How many grams of bromine are required to react completely with 37.4 grams aluminum chloride?

AlCl₃ + Br₂ → AlBr₃ + Cl₂

• 33.6 g

• 134.5 g

• 29.9 g

• 67.5 g

How many grams of water are produced when 2.50 mol oxygen reacts with hydrogen?
2 H₂ + O₂ → 2 H₂O

• 0.277 g
• 22.5 g
• 45.0 g
• 90.0 g

Tags

NGSS.HS-PS1-7

How many grams of Fe₃O₄ are required to react completely with 300. grams of H₂?

Fe₃O₄ + H₂ → Fe +H₂O

• 2096 g

• 1.54 g

• 8580 g

• 37.5 g

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

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the

• theoretical yield
• mole ratio
• actual yield
• percentage yield

Tags

NGSS.HS-PS1-7

How many moles of water could form from 5.00 moles of hydrogen?

• 5.00 moles

• 10.00 moles

• 2.50 moles

• No Reaction

Tags

NGSS.HS-PS1-7

B₂H₆ + 3O₂ → 2 HBO₂ + 2 H₂O

What mass of O₂ will be needed to burn 36.1 g of B₂H₆? mass to mass

• 18.05 g O₂

• 3.87 mol of O₂

• 125 g O₂

• 62 g O₂

In a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 10.1 grams. What is his percent yield? percent yield

• 82.1%

• 0.82%

• 18 %

• 0.18%

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

Tags

NGSS.HS-PS1-7