Answer to Question #201305 in General Chemistry for ARCHIE MEDINA

Question #201305

B. Calculate the mass in grams of each of the following samples.

a.1.50x1018 atoms Ne

b.8.35x1021 mole3cules CH4


1. What is the percent composition of the following compounds?

a.Naphtalene(C10 H8)

b Sucrose (C12 H22 O11)

c Aluminom sulfate (Al2SO4)3

1
Expert's answer
2021-06-02T06:02:30-0400

B) a. 1.59 × 1018/ 6.023 × 1023

0.00000264 × 20.1797

= 0.0000533g

b). 8.35 × 1021/6.023 × 1023

= 0.0139g

1.a) Molar Mass of Naphthalene = 128.071

C = 12.0107 × 10 = 120.107

= 120.107/128.071× 100 = 93.78%

H = 8.0635/128.071 × 100 = 6.3%


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