Cisplatin, an anticancer drug, has the molecular formula . What is the mass (in gram) of one molecule? (Atomic weights : Pt=195, H=1.0, N=14, Cl=35.5)
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4.
The conversion of oxygen to ozone occurs to the extent of 15% only. The mass of ozone that can be prepared from 67.2 L oxygen at 1 atm and 273 K will be:
1. 14.4 gm
2. 96 gm
3. 640 gm
4. 64 gm
Average atomic mass of magnesium is 24.31 a.m.u. This magnesium is compound of 79 mole% of and remaining 21 mole % of and . Calculate mole% of .
1. 10
2. 11
3. 15
4. 16
Calculate the % of free in oleum (a solution of in ) that is labelled 109% .
1. 40
2. 30
3. 50
4. None
Suppose two elements X and Y combine to form two compounds and when 0.05 mole of weighs 5 g while 3.0111023 molecules of weighs 85 g. The atomic masses of x and y are respectively:
1. 20, 30
2. 30, 40
3. 40, 30
4. 80, 60
The impure 6 g of is dissolved in water and then treated with excess of silver nitrate solution. The weight of precipitate of silver chloride is found to be 14 g. The % purity of solution would be:
1. 95%
2. 85%
3. 75%
4. 65%
60 mL of a mixture of nitrous oxide and nitric oxide was exploded with excess of hydrogen. If 38 mL of was formed, calculate the volume of each gas in the mixture. All measurements are made at constant P and T.
1.20 ml +30 ml
2. 44 ml + 16 ml
3. 10 ml+40 ml
4 .25 ml +25 ml
The haemoglobin from the red blood corpuscles of most mammals contains approximately 0.33% of iron by mass. The molar mass of haemoglobin as 67,200. The number of iron atoms in each molecule of haemoglobin is (atomic mass of iron=56):
1. 2
2. 3
3. 4
4. 5
Volume strength of 1 M solution of is:
1. 11.2 2. 22.4
3. 10.8 4. 21.6
A 2 g sample of xenon reacts with fluorine. The mass Of compound produced is 3.158 g. The empirical formula of the compound is
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