Question

Find the formula unit mass of: (a) NaCl (b) FeO (c) NaHCO3 (d) CuSO4

Answer 1

1)Sodium chloride
2)ferium oxide
3)sodium hydro carbon-tri-oxide
4)cooper sulfur oxide

Answer 2

Answer:

a)58.5g

b) 72g

c) 84g

d) 159g

Explanation:

a) atomic mass of Na: 23

atomic mass of Cl: 35.5

formula mass unit of NaCl: 23+35.5 =58.5g

b) atomic mass of Fe: 56

atomic mass of O: 16

formula mass unit of FeO: 56+16 =72g

c) atomic mass of Na: 23

atomic mass of H: 1

atomic mass of C:12

atomic mass of O3: 3×16

=48

formula mass unit of NaHCO3: 23+1+12+48 =84g

d) atomic mass of Cu: 63

atomic mass of S: 32

atomic mass of O4: 16×4

=64

formula mass unit of CuSO4 : 63+32+64 =159g

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