No of molecules in 2.2 grams of `Co_(2)`

Calculate the number of molecules in 8 grams of O_(2) .

No. of molecules in 44 grams of CO_2 is equal to

The number of molecules in 11 g of CO_(2) is same as that in

Calculate the number of gram atoms and gram molecules in 2.54 mg of iodine (I_(2)) . (Atomic mass of I = 127 amu).

The mass of one molecule of O_2 in grams is ___.

A flask contains 2.0xx10^(13) molecules of CO_(2) . To this 1.5xx10^(14) molecules of CO_(2) are added. The number of molecules in the flask now is