Q5 of 27 Page 46

Calculate the gram molecular mass/gram formula mass of the following.

CaCl2


(Gram atomic masses H = 1 g, N = 14 g, O = 16 g, Na = 23 g, S = 32 g, Cl = 35.5 g, Ca = 40 g)

CaCl2

Gram atomic mass of Ca=40g


Gram atomic mass of Cl=35.5g


GMM of CaCl2 = 40g + 2 × 35.5g


GMM of CaCl2 = 111g


Thus, gram molecular mass of CaCl2 is 111g


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4

Find the number of gram atomic masses in each of the following.

1 g of calcium


(Atomic mass He = 4, O = 16, N = 14, Ca = 40)

 5

Calculate the gram molecular mass/gram formula mass of the following.

HNO3


(Gram atomic masses H = 1 g, N = 14 g, O = 16 g, Na = 23 g, S = 32 g, Cl = 35.5 g, Ca = 40 g)

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Calculate the gram molecular mass/gram formula mass of the following.

Na2SO4


(Gram atomic masses H = 1 g, N = 14 g, O = 16 g, Na = 23 g, S = 32 g, Cl = 35.5 g, Ca = 40 g)

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Calculate the gram molecular mass/gram formula mass of the following.

NH4NO3


(Gram atomic masses H = 1 g, N = 14 g, O = 16 g, Na = 23 g, S = 32 g, Cl = 35.5 g, Ca = 40 g)