Mole Concept
Trending Questions
- XO
- XO2
- X2O5
- X2O3
Calculate the number of atoms in each of the following
(i)
(ii)
(iii)
- 1:4
- 16:1
- 4:1
- 2:1
- 8.65×1018
- 3.81×104
- 1.91×1010
- 6.023×1015
- 7.55 %
- 7.95 %
- 8.55 %
- 8.95 %
- 230 u
- 250 u
- 278 u
- 270 u
- 1.4×10−21g
- 1.09×10−21g
- 5.025×1023g
- 16.023×1023g
[Atomic mass: Ag = 108 u, Br = 80 u]
- 0.1
- 1
- 0.5
- 2
What is the molecular weight of sulfuric acid?
What is the atomic mass of Manganese?
What is the molar mass of calcium?
The charge on 1 g ions of Al3+ is
1/3 x NAe coulomb
1/9 x NAe coulomb
3 x NAe coulomb
1/27 x NAe coulomb
- 6.023×1022
- 1.338×1022
- 6.023×1020
- 7.338×1022
- 0.00224 L of water vapours at 1 atm and 273 K
- 0.18 g of water
- 18 mL of water
- 10–3 mol of water
- 6.022×1023 molecules of oxygen
- 6.022×1023 atoms of oxygen
- 16 g of oxygen.
- 32 g of oxygen.
- 1 g of O
- 1 g of O2
- 1 g of O3
- all have the same no of atoms.
- 5:2
- 2:5
- 1:2
- 5:4
[H3O+]=10−6 molL−1. What is the value of Kw at 90∘C?
- 10−6
- 10−12
- 10−14
- 10−8
- 75%
- 25%
- 60%
- 80%
- 6.023×1023 moles of S
- 1 mole of S
- 4 moles of S
- 2 moles of S
- 6.023×1019
- 1.084×1018
- 4.84×1017
- 5.023×1023
The number of atoms present in one mole of an element is equal to Avogadro number. Which of the following element contains the greatest number of atoms ?
(a) 4 g He (b) 46 g Na (c) 0.40 g Ca (d) 12 g He
- 2.82×10−24 g
- 3.82×10−23 g
- 2.82×10−23 g
- 3.82×10−24 g
The mass ratio of oxygen and nitrogen of a particular gaseous mixture is 1:4. The ratio of number of their molecule is
1 : 4
7 : 32
1 : 8
3 : 16
Calculate the molecular mass of MgCO3.
What is the formula mass of ethyl alcohol, ?
- 4
- 6
- 3
- 2