Advertisements
Advertisements
प्रश्न
Calculate the molar mass of the following substance:
Ethyne, C2H2
Advertisements
उत्तर
The molar mass of C2H2
= 2 × atomic mass of C + 2 × atomic mass of H
= (2 × 12 + 2 × 1) u
= (24 + 2) u
= 26 u
APPEARS IN
संबंधित प्रश्न
Calculate the molar mass of the following substance:
Phosphorus molecule, P4 (atomic mass of phosphorus = 31)
Fill in the following blanks :
A mole represents an .............. number of particles of a substance.
Calculate the mole ratio of 240 g of calcium and 240 g of magnesium. (Ca = 40 u ; Mg = 24 u)
What do you understand by the term mole? How many elementary units are in one mole of a substance?
Calculate the weight of one molecule of oxygen.
[Avogadro’s number = 6 × 1023, O = 16 ]
How many grams of Al are present in 0.2 mole of it?
How many grams of HCl are present in 0.1 mole of it?
Calculate the number of gram atoms in 4.6 gram of sodium.
How many grams are there in the following?
5 moles of sulphur molecule, S8
Compute the difference in masses of 103 moles each of magnesium atoms and magnesium ions.
(Mass of an electron = 9.1×10–31 kg)
