Question

Q.2. Calculate the molecular mass of the following compounds :-
a) Calcium sulphate (Ca=40, S =32, O = 16)
b) Sodium hydroxide (Na - 23, O=16, H=1)
c) Ammonium carbonate (N=14, C-12, O=16, H=1)
d) Zinc phosphate (Zn=65. P-31, 0-16)
e) Aluminium chloride (AL-27, CI = 35.5)​

Answer 1

Answer:

a) Calcium sulphate = 136

b) Sodium hydroxide = 40

c) Ammonium carbonate = 96

d) Zinc phosphate = 386

e) Aluminium chloride = 133

Please mark my answer as BRAINLIEST...

Answer 2

Question :

Calculate the molecular mass of the following compounds :

• Calcium sulphate
• Sodium hydroxide
• Ammonium carbonate
• Zinc phosphate
• Aluminum chloride

Answers :

The molecular masses of the compounds are as follows :

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• Calcium sulphate (Ca=40, S=32, O=16)

»» Calcium sulphate = $\bf CaSO_4$

»» 1(Ca) + 1(S) + 4(O)

»» 1(40) + 1(32) + 4(16)

»» 136 g/mol

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• Sodium hydroxide (Na=23, O=16, H=1)

»» Sodium hydroxide = $\bf NaOH$

»» 1(Na) + 1(O) + 1(H)

»» 1(23) + 1(16) + 1(1)

»» 40 g/mol

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• Ammonium carbonate (N=14, C=12 O=16, H=1)

»» Ammonium carbonate = $\bf (NH_4)_2CO_3$

»» 2(N) + 8(H) + 1(C) + 3(O)

»» 2(14) + 8(1) + 1(12) + 3(16)

»» 96 g/mol

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• Zinc phosphate (Zn=65.5, P=31, O=16)

»» Zinc phosphate = $\bf Zn_3(PO_4)_2$

»» 3(Zn) + 2(P) + 8(O)

»» 3(65.5) + 2(31) + 8(16)

»» 386.5 g/mol

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• Aluminum chloride (Al=27, Cl=35.5)

»» Aluminum chloride = $\bf AlCl_3$

»» 1(Al) + 3(Cl)

»» 1(27) + 3(35.5)

»» 133.5 g/mol

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