Advertisements
Advertisements
प्रश्न
How many grams are there in the following?
2 moles of the hydrogen molecule, H2.
Advertisements
उत्तर
Formula = No. of moles (n) × (Gram molecular mass)
Mass of 2 moles of H2 molecule
= 2 × 2 = 4 g
APPEARS IN
संबंधित प्रश्न
Calculate the percentage of water of crystallization in CuSO4.5H2O
(H = 1, O = 16, S = 32, Cu = 64)
What name is given to the amount of substance containing this number of atoms ?
What weight of each element is present in 1.5 moles of sodium sulphite, Na2SO3 ?
(Atomic masses : Na = 23 u ; S = 32 u ; O = 16 u)
If 0.2 mol of the following substance is required how many grams of that substance should be taken?
Sodium chloride
Correct the following statement :
Equal masses of all gases under identical conditions contain the same number of molecules.
Define the term:
Mole
Calculate the mass of 0.1 mole of the following:
CaCO3
(Ca = 40, Na = 23, Mg = 24, S = 32, C = 12, Cl = 35.5, O = 16, H = 1)
Determine the number of molecules in a drop of water which weighs 0.09 g.
The molecular formula for elemental sulphur is S8.In a sample of 5.12 g of sulphur:
How many molecules and atoms are present?
Solid ammonium dichromate decomposes as under:
\[\ce{(NH4)2Cr2O7 -> N2 + Cr2O3 + 4H2O}\]
If 63 g of ammonium dichromate decomposes. Calculate;
- the quantity in moles of (NH4)2Cr2O7
- the quantity in moles of nitrogen formed
- the quantity in moles of nitrogen formed
- the loss of mass
- the mass of chromium (III) oxide formed at the same time.
