Q4 of 27 Page 46

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

100 g of helium


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

Gram atomic mass: The mass of an element in grams is numerically equal to the atomic mass of the element is one gram atomic mass.

1 GAM (gram atomic mass) = Mass in grams equal to atomic mass


a. Given: Mass of helium = 100g


Atomic mass of helium = 4


1 GAM of helium = 4g


Apply the formula given below:





Number of gram atomic mass = 25g


Thus, number of gram atomic mass of helium is 25g


More from this chapter

All 27 →
2

Which, among the following, is used as the basis for expressing atomic mass?

(Hydrogen, Carbon - 12, Carbon - 14, Oxygen - 16)

 3

The atomic mass of helium is 4 and that of oxygen is 16. How many grams of helium is required to get as many number of atoms as are present in 40 g of oxygen.

(40 g, 160 g, 10 g, 4 g)

 4

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

200 g of oxygen


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

 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)