Item 12 What is the mass, in grams, of each of the following? Part A 2.6×10 3 mo

Question

Item 12

What is the mass, in grams, of each of the following?

Part A

2.6×103 mol Sb

Express your answer using two significant figures.

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Part B

3.55×102 mol Ba

Express your answer using three significant figures. m =   g

Part C

44.1 mol Xe

Express your answer using three significant figures.

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Part D

1.2 mol W

Express your answer using two significant figures.

Item 12

You may want to reference ( pages 51 - 55) section 2.8 while completing this problem.

What is the mass, in grams, of each of the following?

Part A

2.6×103 mol Sb

Express your answer using two significant figures.

SubmitHintsMy AnswersGive UpReview Part

Part B

3.55×102 mol Ba

Express your answer using three significant figures. m =   g

Part C

44.1 mol Xe

Express your answer using three significant figures.

SubmitHintsMy AnswersGive UpReview Part

Part D

1.2 mol W

Express your answer using two significant figures.

m = g m = g m = g

Explanation / Answer

Part A:

Sb atomic wt: 121.75 g/mol.atom

2.6×103 mol Sb = 0.0026 mol Sb = 0.0026 x 121.75 = 0.32 g

Part B:

Barium atomic wt: 137 g/mol.atom

3.55×102 mol Ba = 0.0355 mol Ba = 0.0355 x 137 = 4.86 g

Part C:

Xenon atomic wt: 131 g/mol.atom

44.1 mol Xe = 44.1 x 131 = 578 g

Part D:

Wolfram or Tungsten (W) atomic wt: 184 g/mol.atom

1.2 mol W = 1.2 x 184 = 220.8 g = 2.2 x 102 g

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