Question

calculate the formula unit mass of na2co310h2o

Answer 1

Explanation:

• Formula unit mass of Na2CO3

= 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 10H2O=10×atomic mass of H2O

=10×18.02

=180.02u

Formula unit mass of Na2CO3.10H20 =

=105.97+180.02

=285.99u

Answer 2

Answer:

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• = 2 × ( Atomic mass of sodium ) + atomic mass of carbon + 3 × ( atomic mass of oxygen ) + 20 × ( atomic mass of hydrogen ) + 10 × ( atomic mass of oxygen ) = 2 × 23 + 12 + 3 × 16 + 20 × 1 + 10 × 16 = 46 + 12 + 48 + 20 + 160 = 286 a . m . u .