Question

calculate the relative formula mass Na2 CO3 10 H2O​

Answer 1

Answer:

286

Explanation:

Formula unit mass of Na

2CO3

= 2×atomic mass of Na+1×atomic mass of C+3×atomic mass of O

=2×22.98+1×12.01+3×16

=105.97u

Formula unit mass of 10H

2 O=10×atomic mass of H

2O

=10×18.02

=180.02u

Formula unit mass of

Na2 CO3.10H2O=105.97+180.02

=285.99u