Advertisements
Advertisements
Questions
Calculate the molecular mass of the following:
Na2SO4.10H2O
Given atomic masses of Na = 23, H = 1, O = 16, C = 12, N = 14, Mg = 24, S = 32
Calculate the molecular mass of the following compound:
Na2SO4.10H2O
Advertisements
Solution
Atomic Masses: Na = 23, S = 32, O = 16, H = 1
(2 × 23) + 32 + (4 × 16) + 10 × [(2 × 1) + 16]
= 46 + 32 + 64 + 180
= 322 u
RELATED QUESTIONS
Calculate the formula unit mass of K2CO3 given the atomic mass of
- Zn = 65 u
- Na = 23 u
- K = 39 u
- C = 12 u
- O = 16 u
Calculate the molecular mass of nitric acid, HNO3. (Atomic masses : H = 1 u ; N = 14 u ; O = 16 u)
Convert 12 g of oxygen gas into moles.
Calculate the molar masses of the following substances. Write the results with proper units.
- Ozone molecule, O3
- Ethanoic acid, CH3COOH
Write the name of the following compound and deduce its molecular mass.
Na2SO4
Calculate:
The volume of 4g of H2 at 4 atmosphere.
Calculate the weight/mass of 0.25 gram atom of calcium.
Write the name of the following compound and deduce its molecular mass.
NaHCO3
Calcium carbonate reacts with dilute hydrochloric acid as given below:
\[\ce{CaCO3 + 2HCl -> CaCl2 + H2O + CO2}\]
- What is the mass of 5 moles of calcium carbonate? (Relative molecular mass of calcium carbonate is 100)
- How many moles of HCl will react with 5 moles of calcium carbonate?
- What is the volume of carbon dioxide liberated at S.T.P. at the same time?
A gas occupied 360 cm3 at 87°C and 380 mm Hg pressure. If the mass of gas is 0.546 g, find its relative molecular mass.
