Question

A 0.45-g sample of aspirin is decomposed into its constituent elements and found to contain 0.27 g C, 0.020 g H and 0.16 g O

Answer 1

Explanation:

Given parameters:

Mass of aspirin = 0.45g

Mass of C = 0.27g

Mass of H = 0.02g

Mass of O = 0.16g

Unknown:

Mass percentage of the constituents = ?

Solution:

To find the mass percent, ensure that sum of the mass of the elements  add up to the that of the given mass of aspirin

 Total mass = 0.27 + 0.02 + 0.16 = 0.45g

Now express each of the given percentages to that of the total one.

mass percent of C = $\frac{0.27}{0.45}$ x 100 = 60%

mass percent of H = $\frac{0.02}{0.45}$ x 100 = 4.4%

mass percent of O = $\frac{0.16}{0.45}$ x 100  = 36%

learn more

Mass concentration brainly.com/question/8170905

#learnwithBrainly