1. At certain temperature and pressure, 1 liter of X gas has mass 1,5 gram. If in that condition the mass of 10 L of NO gas (Mr =30) is 7,5 gram, so relative molecular mass of X gas is…
A. 67,2
B. 60
C. 22,6
D. 30
E. 26,5
2. In the following fertilizer, which one is contain the greater number of Nitrogen?
A. (NH4)2SO4 (Mr = 142)
B. (NH4)3PO4 (Mr = 150)
C. (NH2)2CO (Mr = 60)
D. NH4NO3 (Mr = 80)
E. NaNO3 (Mr = 85)
3. In the following substance which one is contain the greater amount of molecule…
A. 5 gram of NO(Mr = 30)
B. 6 gram NO2(Mr = 46)
C. 7 gram N2O3(Mr = 76)
D. 8 gram N3O4(Mr = 92)
E. 10 gram N2O5 (Mr = 108)
4. 1,6 gram of any substance contain 2,4 x 1022 molecule. Mr of this substance is…
A. 16
B. 24
C. 32
D. 36
E. 40
5. At certain temperature and pressure, which one of the following substance has the greater volume in 1 gram of substance…
A. C4H10
B. CO2
C. NO2
D. C3H4
E. SO2
6. In 4,6 gram NO2 (Ar N = 14; O = 16) is contained ... molecule NO2.
A. 6,02 x 1023
B. 3,01 x 1023
C. 6,02 x 1022
D. 3,01 x 1020
E. 1,20 x 1020
7. The number of mol of sulfur in 2 mol Fe2(SO4)3 is....
A. 1 mol
B. 2 mol
C. 3 mol
D. 5 mol
E. 6 mol
8. An closed cylinder contain 1,2 x 1020 molecule of CO2 gas at certain T and P. The amount of atoms which contain in this cylinder is....
A. 4 x 1019
B. 8 x 1019
C. 3,6 x 1020
D. 3,6 x 1021
E. 7,2 x 1021
9. X gram of gas N2O (Ar N = 14, O = 16) is put into closed vessel. If the amount of particle of gas is 3,01 x 1022 molecule, so the mass of gas is....
A. 1,1 gram
B. 2,2 gram
C. 3,3 gram
D. 4,4 gram
E. 5,5 gram
10. In the following unsure, unsure which contain 6.02 x 1023 atoms is....
A. 23 g Na, Ar = 23
B. 28 g Mg, Ar = 24
C. 24 g Ca, Ar = 40
D. 42 g Kr, Ar = 40
E. 78 g K, Ar = 39
11. At 0oC and 1 atm 1,12 L O2 gas has mass... gram. (Ar O = 16)
A. 0,8
B. 1,2
C. 1,6
D. 2,1
E. 2,5
12. A 5,6 liter of X gas at STP has mass 10 gram. The molar mass of X gas is....
A. 20 gram/mol
B. 30 gram/mol
C. 40 gram/mol
D. 50 gram/mol
E. 60 gram/mol
13. There are 2 vessel which have the same volume. The first vessel contain 3 gram of A gas, and the second vessel contain 6 x 1022 molecule B gas. If 2 vessel has same temperature and pressure, so molar mass of A gas is...(1 mol = 6 x 1023 molecule)
A. 90 g/mol
B. 75 g/mol
C. 60 g/mol
D. 30 g/mol
E. 25 g/mol
14. Methane gas, CH4 which has mass 8 gram (Mr = 16) and volume = x L is measured at same T and P as O2 gas which each liter of the O2 gas has mass = 1,6 gram. Volume of CH4 gas is....
A. 5 L
B. 10 L
C. 15 L
D. 20L
E. 25 L
15. At 27oC and 1 atm NO gas (Ar N = 14, O = 16) which has mass 10 gram, has volume…
A. 8,2 L
B. 12,0 L
C. 16,4 L
D. 24,5 L
E. 30,7 L
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