Advertisements
Advertisements
प्रश्न
Calculate the formula masses of the following compounds :
Sodium oxide, Na2O
Advertisements
उत्तर
Formula mass of Na2O:
Formula mass of Na2O = Mass of two Na atoms + Mass of one O atom
= 2 × 23 + 1 × 16
= 46 + 16
= 62
Therefore, the formula mass of Na2O is 62 u.
APPEARS IN
संबंधित प्रश्न
Calculate the molecular mass of CH3OH.
The molecular formula of glucose is C6H12O6. Calculate its molecular mass. (Atomic masses : C = 12 u ; H = 1 u ; O = 16 u)
Calculate the molecular masses of the following :
- Hydrogen, H2
(Atomic masses : H = 1 u ; O = 16 u ; Cl = 35.5 u ; N = 14 u ; C = 12 u)
Calculate the molecular mass of hydrogen bromide (HBr). (Atomic masses : H = 1 u ; Br = 80 u)
Calculate the molecular masses of the following compounds :
Carbon disulphide, CS2
(Atomic masses : H = 1 u ; S = 32 u ; C = 12 u)
An unknown gas shows a density of 3 g per litre at 273°C and 1140 mm Hg pressure. What is the gram molecular mass of this gas?
Calculate the weight/mass of a molecule of NH3.
Calculate the weight/mass of 0.25 gram atom of calcium.
Calculate the molecular mass of the following:
Na2SO4.10H2O
Given atomic mass of Cu = 63·5, H = 1, O = 16, C = 12, N = 14, Mg = 24, S = 32
The mass of one steel screw is 4.11g. Find the mass of one mole of these steel screws. Compare this value with the mass of the Earth (5.98 × 1024kg). Which one of the two is heavier and by how many times?
