Advertisements
Advertisements
प्रश्न
Write the name of the following compound and deduce its molecular mass.
MgCl2
Advertisements
उत्तर
MgCl2 - Magnesium chloride
| Molecule | Constituent elements | Atomic mass u | Number of atoms in the molecule | Atomic mass × number of atoms | Mass of the Constituents u |
| MgCl2 | Mg | 24 | 1 | 24 × 1 | 24 |
| Cl | 35.5 | 2 | 35.5 × 2 | 71 |
The Molecular mass of MgCl2 = Sum of Constituent atomic masses
(Molecular mass of MgCl2) = (Atomic mass of Mg) × 1 + (Atomic mass of Cl) × 2
= (24 × 1) + (35.5 × 2)
= 24 + 71
= 95 u
APPEARS IN
संबंधित प्रश्न
Calculate the molecular mass of H2.
Calculate the formula unit mass of Na2O given the atomic mass of
- Zn = 65 u
- Na = 23 u
- K = 39 u
- C = 12 u
- O = 16 u
What is the significance of the formula H2O ?
Calculate the molecular mass of nitric acid, HNO3. (Atomic masses : H = 1 u ; N = 14 u ; O = 16 u)
Calculate the molecular masses of the following :
Oxygen, O2
(Atomic masses : H = 1 u ; O = 16 u ; Cl = 35.5 u ; N = 14 u ; C = 12 u)
Calculate the molecular masses of the following compounds :
Ethene, C2H4
(Atomic masses : C = 12 u ; H = 1 u)
Which of the following elements has the same molecular mass as its atomic mass ?
Convert 12 g of oxygen gas into moles.
Calculate the mass of 12.044 × 1025 molecules of oxygen (O2).
Write the name of the following compound and deduce its molecular mass.
Na2SO4
A gas cylinder of capacity of 20 dm3 is filled with gas X the mass of which is 10 g. When the same cylinder is filled with hydrogen gas at the same temperature and pressure the mass of the hydrogen is 2 g, hence the relative molecular mass of the gas is ______.
Calculate the molecular mass of the following:
(NH2)2CO
Given atomic mass of Cu = 63·5, H = 1, O= 16, C = 12, N = 14, Mg = 24, S = 32
Calculate:
The volume of 4g of H2 at 4 atmosphere.
From the equation
\[\ce{3Cu + 8HNO3 -> 3Cu(NO3)2 + 4H2O + 2NO}\]
(Atomic mass Cu = 64, H = 1, N = 14,O = 16)
Calculate the mass of copper needed to react with 63g of HNO3.
Calculate the relative molecular mass of ZnCO3.
Calculate the relative molecular mass of CaSO4 [Zn = 65, S=32, O = 16, Ca = 40, C = 12]
What are ionic and molecular compounds? Give examples.
Write the formulae for the following and calculate the molecular mass for each one of them.
- Caustic potash
- Baking powder
- Limestone
- Caustic soda
- Ethanol
- Common salt
Write the name of the following compound and deduce its molecular mass.
K2CO3
Write the name of the following compound and deduce its molecular mass.
CO2
