The stoichiometry of the following reaction is K2S2O8 (aq) + 2KI (aq) → 2 K2SO4 (aq) + I2 (aq)
1:1
2:2
1:2
2:1
The number of atoms in 0.1 mol of a triatomic gas is.
4. 026 × 1023
5. 02 × 1023
1.806 × 1023
6. 02 × 1013
Mass of 0.1 mole of methane is
1g
0.1g
16g
1.6g
A mixture containing 2 mol each of H2 and O2 is ignited so that water is formed. The amount of water formed is
18g
36g
1.8g
In a given sample of H2O2 each 100ml of solution contains 68 mg of H2O2. The molarity of the solution is
0.02m
0.2m
2m
20m
The amount of H2S required to precipitate 1.69 g BaS from BaCl2 solution is
3.4 g
0.24g
0.34 g
0. 17 g
The standard adopted for the determination of atomic weight of elements is based on
H1
C12
O16
S32
1 g atom N2 represents
6.02 × 1023 N2 molecules
22. 4 L of N2 at STP
11. 2 L of N2 at STP
28 g of N2
What is the mass of 1 mole of electron?
6.02 × 1015
8.1 × 1022
0.55 mg
7. 52 × 1023
What is the stoichiometric coefficient of Ca in the reaction?
Ca + Al3+ → Ca2+ + Al
2
1
3
4
