Advertisements
Advertisements
प्रश्न
Calculate the molar masses of the following substances. Write the results with proper units.
- Ozone molecule, O3
- Ethanoic acid, CH3COOH
Advertisements
उत्तर
- Molar mass of ozone (O3)
Molar mass of ozone = 16 + 16 +16 = 48 g/mol - Molar mass of acetic acid (CH3COOH)
Molar mass of acetic acid = (2 × 12) + (4 × 1) + (2 × 16) = 60 g/mol
APPEARS IN
संबंधित प्रश्न
Calculate the molecular mass of CH3OH.
Calculate the formula masses of the following compounds :
- Calcium chloride
- Sodium carbonate
(Given : Atomic masses : Ca = 40 u ; Cl = 35.5 u ; Na = 23 u ; C = 12 u; O = 16 u)
What is meant by the ‘molar mass’ of a substance ? State the unit in which molar mass is usually expressed.
Calculate the molecular mass of the following:
CH3COONa
[At mass : C = 12, H = 1, O = 16, Cl = 35.5, N = 14, Cu = 63.5, S = 32, Na = 23, K = 39, Pt = 195, Ca = 40, P = 31, Mg = 24]
Calculate:
The mass of oxygen in 2.2 litres of CO2 at STP.
Calculate the weight/mass of: `10^22` atoms of carbon
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
Molar mass of CO2 is 42g.
What are ionic and molecular compounds? Give examples.
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?
