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 CO2.
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 compounds :
Hydrogen sulphide, H2S
Calculate the molecular masses of the following compounds :
Carbon disulphide, CS2
(Atomic masses : H = 1 u ; S = 32 u ; C = 12 u)
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)
Calculate the mass of 12.044 × 1025 molecules of oxygen (O2).
How many moles are there in 34.5 g of sodium ? (Atomic mass of Na = 23 u)
From the equation:
\[\ce{C + 2H2SO4 -> CO2 + 2H2O + 2SO2}\]
Calculate the mass of carbon oxidized by 49 g of sulphuric acid (C = 12, relative molecular mass of sulphuric acid = 98)
Calculate the molecular mass of the following:
CuSO4·5H2O
Given atomic mass of Cu = 63·5, H = 1, O = 16, C=12, N = 14, Mg = 24, S = 32
Calculate the molecular mass of the following:
Mg3N2
Given atomic mass of Cu = 63·5, H = 1, O = 16, C = 12, N = 14, Mg = 24, S = 32
Calculate the weight/mass of an atom of hydrogen.
Calculate the weight/mass of the molecule of oxygen.
Calculate the weight/mass of: `10^22` atoms of carbon
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
Fill in the blank with the correct word from the options given below:
Relative molecular mass of an element/compound is the number of times one ________ of the substance is heavier than −1/12that the mass of an atom of carbon [C12].
What is the SI prefix for each of the following multiples and submultiples of a unit?
- 103
- 10–1
- 10–2
- 10–6
- 10–9
- 10–12
The modem atomic mass scale is based on ______.
Write the name of the following compound and deduce its molecular mass.
K2CO3
Calcium carbonate react with dilute hydrochloric acid as given below:
\[\ce{CaCO3 + 2HCl -> CaCl2 + H2O + CO2}\]
How many moles of \[\ce{HCl}\] will react with 5 moles of calcium carbonate?
