What volume of hydrogen gas at 273 K and 1 atm pressure will be consumed in obtaining 21.6 g elemental boron (atomic mass = 10.8) from the reduction of boron trichloride by hydrogen?
= 67.2 L = 21.6 g
250mL of a sodium carbonate solution contains 2.65 grams of Na2CO3. If 10mL of this solution is diluted to one litre, what is the concentration of the resultant solution?
(mol. wt. of Na2CO3= 106)
7.5 grams of a gas occupy 5.6 litre of volume at S.T.P The gas is
An aqueous solution of 6.3 g of oxalic acid dihydrate is made up to 250mL. The volume of 0.1 N NaOH required to completely neutralize 10mL of this solution is
How many moles of electrons weight one kilogram?
Number of atoms in 558.6 g Fe (molar mass Fe = 55.86 g mol–1)is
3 g of an oxide of a metal is converted to chloride completely and it yielded 5 g of chloride. The equivalent weight of the metal is
What will be the volume of the mixture after the reaction?
(g)NH3 (1L) + (g) HCl (1.5L) → NH4Cl (s)
A compound has haemoglobin like structure. It has one Fe. It contain4.6% of Fe. The approximate molecular mass is
In Haber process, 30 litre of dihydrogen and 30 litres of dinitrogen were taken for reaction which yielded only 50% of the expected product. What will the composition of the gaseous mixture under the aforesaid condition in the end?
Which has maximum number of atoms?