Henrys law constant for CO2 in water is 1.6×108 Pa at 298K.
Calculate quantity of CO2 in 500 mL of soda water when packed under 2.5 atm CO2 pressure at 298K.
Calculate the mole fraction of benzene in a solution containing 30% by mass of carbon tetrachloride
The density of a 2.05 M solution of acetic acid in water is 1.02 g/ml. The molality of the solution is:
Calcium hydroxide reacts with carbon dioxide to form.
Calcium carbonate and water.
Calcium carbonate and hydrogen.
Calcium bicarbonate and water.
None of the above.
- 4.2 NA
- 3.2 NA
- 2.4 NA
- 1.6 NA
Benzene and toluene form nearly ideal solution .At 313K the vapour pressure of pure benzene is 150mm Hg and of pure toluene is 50 mm Hg .calculate vapour pressure of mixture of these two containing their equal masses at 313 K .
3g of H2 react with 29g of O2 to yield H2O, which is the limiting reactant? Calculate the maximum amount of H2O that can be formed. Calculate the amount of the reactant which remains unreacted.
Calculate the mass of 1 atom of nitrogen.
Translate the following statement into a chemical equation and then balance the equation:
Aluminium metal replaces iron from ferric oxide (Fe2O3), giving aluminium oxide and iron.
Calculate the total number of electrons present in 1.4 g of dinitrogen gas.
5 moles of AB2 weigh 125×10−3kg and 10 moles of A2B2 weigh 300×10−3kg.The molar mass of A(MA) and molar mass of B(MB) in kg/mol are :
- 1.78 M
- 1.02 M
- 2.05 M
Caffeine has a molecular weight of 194.If it contains 28.9% by mass of Nitrogen, the number of atoms of Nitrogen in one molecule of caffeine is(pls give an explanation for necessary steps)
- 10 L
- 7 L
- 6 L
- 5 L
- 0.186 moles
- 0.0093 moles
- 0.21 moles
- 2.10 moles
How many litres of oxygen at STP are required for the complete combustion of 39 g of liquid benzene?
- 74 L
- 11.2 L
- 22.4 L
- 84 L
The weighed out to make of an aqueous solution containing per mL is g.
If one atom of an element x weigh . What will be the number of moles in 20 Kg?
- 120 g
- 30 g
- 20 g
- 100 g
Average Molecular Mass of ozonised oxygen is 36. Calculate percentage of oxygen in ozonised oxygen
What is the weight of the residue obtained when of silver carbonate is strongly heated?
- 1.5 mole of NO is formed
- All the ammonia is consumed
- 1.0 mole of H2O is produced
- All the oxygen is consumed
The equation for the combustion of glucose is: . How many grams of will be produced when of glucose is burned?
An organic compound contains 69% carbon and 4.8% hydrogen, the remainder being oxygen. Calculate the masses of carbon dioxide and water produced when 0.20 g of this substance is subjected to complete combustion.
(At. Wt. : Mg = 24)
Given the reaction :
(Atomic mass of Fe=56 g.
a) Calculate the mass of ammonia produced if 2.00 ×103 g of nitrogen reacts with 1.00 ×103 g.
b) Will any of the two reagents will remain unreacted. If yes, which one and what would be its mass.