TEST YOURSELF 1.6
(1)
Which term is used to represent the
mass of 1 mole of molecules of a substance?
Gram molecular mass is used to represent the mass of 1 mole of molecules of a
substance.
(2)
How many atoms are present in one
gram atomic mass of a substance?
6.02*1023 atoms
are present in one gram atomic mass of a substance. Because one gram means that
atomic mass of a substance expressed in grams.
(3)
Explain the relationship between mass
and mole of a substance.
The relationship between
mass and mole of a substance is given as following :
Mass of a substance = No
of moles * Molar mass
(4)
Find out the mass of 3 moles of
oxygen atoms?
No of
moles of oxygen = 3 mol
Molar
mass of oxygen atom = 16 g mol-1
Mass of
oxygen atom = No of moles * Molar mass
Mass of
oxygen atom = 3*16
= 48
grams
(5)
How many molecules of water are present in
half mole of water?
No of moles of water = ½ mol
Number of water
molecules = ?
Number of water
molecules = No of moles * NA
Number of water
molecules = ½ * 6.02*1023
=3.01 * 1023 molecules
