More Stoichiometry

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

Use the following equation:
2NaOH(aq) + H₂SO₄(aq) --> 2H₂O(l) + Na₂SO₄(aq)
How many grams of sodium sulfate will be formed if you start with 200.00 grams of sodium hydroxide?

• 150.22 g Na₂SO₄
• 593.44 g Na₂SO₄
• 355.13 g Na₂SO₄

• 297.65 g Na₂SO₄

Tags

PA.AS.SCT.9-12.3.2.C.A4.iii

PA.SCI.9-12.PS.2.5

PA.SCI.3.2.9-12.G

Using the balanced equation:

Mg + 2HCl --> MgCl₂ + H₂

How many moles of HCl are consumed in the production of 7.5 moles of MgCl₂?

• 3.8 moles

• 15 moles

• 7.5 moles

• 23 moles

CH₄ + 2 O₂ → CO₂ + 2 H₂O
How many moles of carbon dioxide are produced from the combustion of 110. g of CH₄?

• 13.7 g

• 302 g

• 6.11 mol
• 6.85 mol

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
 What mass of O₂ will be needed to burn 36.10 g of B₂H₆?

• 13.80 g O₂

• 3.860 mol of O₂

• 125.2 g O₂
• 10.41 g O₂

Tags

NGSS.HS-PS1-7