The Mole Calculations

To transform from grams of one substance to grams of another, what are the steps you take?

• Grams A --> Moles A--> Grams B --> Moles B

• Grams A --> Moles B --> Grams B

• Grams A --> Grams B

• Grams A --> Moles A --> Moles B --> Grams B

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NGSS.HS-PS1-7

When you start with grams of a substance, the next conversion factor will be....

• Molar Mass A

  1 mole A

• Molar Mass A

  Given Mass A

• 1 Mole A

  Molar Mass A

• 1 mole A

  1 mole B

For the second step, what is the correct set up with the molar ratio?

• ___ mole A

  ___ mole B

• 1 mole A

  1 mole B

• 1 mole B

  ___ mole A

• ___ mole B

  ___ mole A

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NGSS.HS-PS1-7

For the final step, what is the correct set up?

• 1 mole B

  molar mass B

• molar mass B

  molar mass A

• molar mass B

  given mass A

• molar mass B

  1 mole B

Tags

NGSS.HS-PS1-7

Using the following equation, calculate how many grams of PBr3 are produced from 50 grams of P. 2 P + 3Br2 --> 2PBr3

• 291 g

• 437 g

• 655 g

• 521 g

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NGSS.HS-PS1-7

Using the following equation, determine which reactant is the limiting reactant, when you mix 10 grams of P and 50 grams of Br2.

2 P + 3Br2 --> 2PBr3

• P

• Br2

• PBr3

• None

Tags

NGSS.HS-PS1-7

Using the following equation, determine how much PBr3 is formed, when you mix 10 grams of P and 50 grams of Br2.

• 50 g

• 87.4 g

• 56.5 g

• 27.7 g

Tags

NGSS.HS-PS1-7

Match the following volumes of water vapor at STP with the number of atoms.

• 131.97 liters

• 1.0645 × 10²⁵

• 336 liters

• 6.023 × 10²³

• 22.4 liters

• 3.548 × 10²⁴

• 112 liters

• 3.54846 × 10²⁴

What is the weight in grams of 1 mole of ammonium sulfate (NH₄)₂SO₄?

• 114.10 g

• 134.25 g

• 118.54 g

• 132.15 g

Select the correct answer. What is the weight in grams of 3.36 × 10^23 molecules of copper sulfate (CuSO4)?

• A. 5.55 g

• B. 89.03 g

• C. 8.903 g

• D. 0.5578 g