The molarity of 30 g Co(NO3)2. 6H2O in 4.3 L of solution is:
1. 0.053 M
2. 0.043 M
3. 0.023 M
4. 0.063 M
1. | 39 g | 2. | 37 g |
3. | 41 g | 4. | 35 g |
1. | 274 atm | 2. | 285 atm |
3. | 295 atm | 4. | 278 atm |
1. | 1.24 g | 2. | 1.45 g |
3. | 1.65 g | 4. | 1.85 g |
The vapour pressure of pure liquids A and B are 450 and 700 mm Hg respectively, at 350 K. If the total vapour pressure is 600 mm Hg then the composition of the vapour phase are:
1. XA=0.30; XB=0.70
2. XA=0.40; XB=0.60
3. XA=0.20; XB=0.90
4. XA=0.50; XB=0.50
1. | 23.40 | 2. | 0.23 |
3. | 12.87 | 4. | 40.14 |