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 O2.
Calculate the molecular mass of CO2.
Calculate the molecular mass of C2H4.
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 chloroform (CHCl3). (Atomic masses : C = 12 u ; H = 1 u ; Cl = 35.5 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 formula masses of the following compounds :
Sodium oxide, Na2O
Calculate the mass of 12.044 × 1025 molecules of oxygen (O2).
If sulphur exists as S8 molecules, calculate the number of moles in 100 g of sulphur. (S = 32 u)
Calculate the molar masses of the following substances. Write the results with proper units.
- Ozone molecule, O3
- Ethanoic acid, CH3COOH
Calculate the molecular mass of the following:
CuSO4·5H2O
Given atomic masses of Cu = 63·5, H = 1, O = 16, C = 12, N = 14, Mg = 24, S = 32
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 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 relative molecular masses of the following
(NH4)2 Cr2O7
[At mass : C = 12, H = 1, O = 16, Ci = 35.5, N = 14, Cu = 63.5, S = 32, K = 39, Pt = 195, Ca = 40, P = 31, Mg = 24]
Molar mass of CO2 is 42g.
What are ionic and molecular compounds? Give examples.
Write the name of the following compound and deduce its molecular mass.
CO2
Write the name of the following compound and deduce its molecular mass.
NaOH
Write the name of the following compound and deduce its molecular mass.
AlPO4
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?
