Question

The wieght of 1 * 10^22 molecules of
CuSO4. 5H2O is-

A- 41.59 g
B- 415.9 g
C- 4.159 g
D- None of these

Answer 1

We know that 6.022 *10^23 molecules = 1.00 mole

1 * 10^22 molecules * 1 mole / 6.022 *10^23 molecules

=0.0166 mole

Amount in g = number of moles * molar mass

= 0.0167 mole* 249.6850 g/mol

=4.159 g

The correct answer is C