Question

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Calculate the molar mass for each of the following:

Part A

ZnSO4, zinc sulfate, zinc supplement.

Express your answer using five significant figures.

M1 =

  g/mol  

Part B

C12H24O2, lauric acid, from coconut oil

Express your answer using five significant figures.

M2 =

  g/mol  

Part C

FeSO4, ferrous sulfate, iron supplement.

Express your answer using five significant figures.

M3 =

  g/mol  

Part D

Ca3(C6H5O7)2, calcium citrate, calcium supplement

Express your answer using five significant figures.

M4 =

  g/mol  

Answer 1

A)

Molar mass of ZnSO4,

M1 = 1*MM(Zn) + 1*MM(S) + 4*MM(O)

= 1*65.38 + 1*32.07 + 4*16.0

= 161.45 g/mol

Answer: 161.45 g/mol

B)

Molar mass of C12H24O2,

M2 = 12*MM(C) + 24*MM(H) + 2*MM(O)

= 12*12.01 + 24*1.008 + 2*16.0

= 200.31 g/mol

Answer: 200.31 g/mol

C)

Molar mass of FeSO4,

M3 = 1*MM(Fe) + 1*MM(S) + 4*MM(O)

= 1*55.85 + 1*32.07 + 4*16.0

= 151.92 g/mol

Answer: 151.92 g/mol

D)

Molar mass of Ca3(C6H5O7)2,

M4 = 3*MM(Ca) + 12*MM(C) + 10*MM(H) + 14*MM(O)

= 3*40.08 + 12*12.01 + 10*1.008 + 14*16.0

= 498.44 g/mol

Answer: 498.44 g/mol