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
What mass of calcium chloride in grams would be enough to produce 14. 35 g of AgCl. Atomic mass Oo Ca = 40, Ag = 108.
5.55 g
8. 295 g
16. 59 g
11. 19g
The standard adopted for the determination of atomic weight of elements is based on
H1
C12
O16
S32
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
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
32g of O2, 2g of H2, 28g of N2 at NTP, occupy separately a volume of
1L
2L
22. 4L
2. 24L
Which of the following is not correct regarding 14 g of CO ?
It corresponds to 0.05 mole of co
It occupies 2.24 L at STP
It corresponds to 3.01 × 1023 molecules of CO
It corresponds to same number of moles of CO2 and nitrogen oxide gases.
How much volume of oxygen at STP in liters required to burn 4g of methane gas completely?
11.2
5.6
2.8
8
