Q5 of 27 Page 46

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)

Gram molecular mass (GMM): The mass in grams equal to the molecular mass of an element or compound is called its gram molecular mass.

1 GMM = Mass in grams equal to atomic mass


HNO3


Gram atomic mass of H=1g


Gram atomic mass of N=14g


Gram atomic mass of O=16g


GMM of HNO3 = 1g + 14g + 3× 16g


GMM of HNO3 = 63g


Thus, gram molecular mass of HNO3 is 63g


More from this chapter

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4

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

70 g of nitrogen


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

 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.

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)

 5

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)