Advertisements
Advertisements
प्रश्न
Write the name of the following compound and deduce its molecular mass.
NaHCO3
Advertisements
उत्तर
NaHCO3 - Sodium bicarbonate
| Molecule | Constituent elements | Atomic mass u | Number of atoms in the molecule | Atomic mass × number of atoms | Mass of the Constituents u |
| NaHCO3 | Na | 23 | 1 | 23 × 1 | 23 |
| H | 1 | 1 | 1 × 1 | 1 | |
| C | 12 | 1 | 12 × 1 | 12 | |
| O | 16 | 3 | 16 × 3 | 48 |
The molecular mass of NaHCO3 = Sum of Constituent atomic masses
(Molecular mass of NaHCO3) = (Atomic mass of Na) × 1 + (Atomic mass of H) × 1 + (Atomic mass of C) × 1 + (Atomic mass of O) × 3
= (23 × 1) + (1 × 1) + (12 × 1) + (16 × 3)
= 23 + 1 + 12 + 48
= 84 u
APPEARS IN
संबंधित प्रश्न
Calculate the molecular mass of H2.
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 masses of the following compounds :
Methanol, CH3OH
Calculate the molecular masses of the following :
Chlorine, Cl2
(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 :
Methane, CH4
(Atomic masses : C = 12 u ; H = 1 u)
Calculate the molecular masses of the following compounds :
Ethane, C2H6
(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.
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 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]
Calculate the molecular mass of the following:
(NH₄)₂SO₄
[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]
Calculate:
The gram molecular mass of chlorine if 308cm3 of it at STP weighs 0.979 g.
Calculate the weight/mass of the molecule of oxygen.
Calculate the weight/mass of 0.25 gram atom of calcium.
Answer the following question using the data given below:
- Assertion: The Relative Molecular Mass of Chlorine is 35.5 a.m.u.
- Reason: The natural abundance of Chlorine isotopes are not equal.
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
Write the name of the following compound and deduce its molecular mass.
AlPO4
Calcium carbonate react with dilute hydrochloric acid as given below:
\[\ce{CaCO3 + 2HCl -> CaCl2 + H2O + CO2}\]
What is the volume of carbon dioxide liberated at S.T.P. at the same time?
