| 1 |
How many moles of AgCI are produced by combination of 1.0 mole of AgNO<sub>3</sub>and 2.0 mole of NaCI |
- A. 1.0
- B. 2.0
- C. 3.0
- D. 4.0
|
| 2 |
The ration of number of molecules of 2 g H2 g to number of molecules of 64 g gaseous oxygen is. |
- A. 1:1
- B. 1:2
- C. 1:32
- D. 1:4
|
| 3 |
What has a mass equal to that of one mole of water. |
- A. 22.4 dm3 of water
- B. One mole of steam
- C. One molecule of water
- D. Two moles of hydrogen molecules and one mole of oxygen molecules.
|
| 4 |
The mass of two moles of electrons is |
- A. 1.10 mg
- B. 1.008 mg
- C. 0.184 mg
- D. 1.673 mg
|
| 5 |
12.04 x 10<sup>23</sup>atoms of nitrogen gas is equal to. |
- A. 1 mol
- B. 2 mol
- C. 3 mol
- D. 4 mol
|
| 6 |
If four moles of sulphur dioxide are oxidized to sulphur trioxide, how many moles of oxygen are needed. |
- A. 0.5
- B. 1.0
- C. 1.5
- D. 2.0
|
| 7 |
The number of H2O molecules in 9 grams of ice is |
- A. 3.01 x 10<sup>23</sup>
- B. 6.02 x 10<sup>23</sup>
- C. 6.02 x 10<sup>8</sup>
- D. 12.04 x 10<sup>23</sup>
|
| 8 |
If the empirical formula of compound is CH2 and its molecular mass is 56 than what is the actual molecular formula of this compound. |
- A. CH2
- B. C2H4
- C. C3H6
- D. C4H8
|
| 9 |
the number of Al<sup>3+</sup> ion sin AlCl<sub>3</sub>is 2.007 x 10<sup>23</sup>. The number of Cl- ions are. |
- A. 6.02 x 10<sup>23</sup>
- B. 3.01 x 10<sup>23</sup>
- C. 3.01 x 10<sup>23</sup>
- D. 1.5 x 10<sup>23</sup>
|
| 10 |
Which is not a molecular ion. |
- A. He+
- B. CH3+
- C. NH3-
- D. CO+
|