Question

20 atoms of Cr(NO3)s. D- Number of grams in 10

Answer 1

Firstly converting,

Atoms -------> moles --------> grams

Molar mass of Cr(NO3)₅ = 362. 02

1 mole of Cr(NO3)₅ = 6.022 × 10²³

=10 ²⁰atoms/1 × 1 mol of Cr(NO3)₅ / 6.022 ×10²³ atoms × 362.02 g Cr(NO3) ₅ / 1mol of Na

Therefore atom will cut with other atom and same with mole will cut other cut Hence,

=10²⁰ × 362.02 g of Cr(NO3) ₅ / 6.022 × 10²³

= 60.12 × 10^-3 gm of Cr(NO3) ₅