A sample of baking soda contains 34.48 g of sodium, 1.51 g of hydrogen, 18.02 g of carbon, and 72.00 g of oxygen.

a. What is the total mass of the sample?

Give your answer as a number with decimals, and a SI unit abbreviation after a space. Ex: 12.02 g

b. What is the percent by mass of each element in baking soda?

Sodium

Hydrogen

Carbon

Oxygen

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tutorAnne tutorAnne · Answer 1 · 2021-09-22T14:57:40+02:00

Total mass of the sample =126.01 g

percent by mass of Sodium=27.40%

percent by mass of Hydrogen=1.198%

percent by mass of Carbon=14.300%

percent by mass of Oxygen=57.138%

Now the

Total mass of the sample of baking soda =Mass of sodium+Mass of hydrogen+mass of carbon+mass of oxygen.

Total mass of the sample of baking soda =34.48 g +1.51 g+18.02 + 72.00 g

Total mass of the sample of baking soda =126.01 g

percent by mass of each element =mass of element / Total mass of sample x 100

Sodium =34.48 g/126.01 g x 100=27.40%

Hydrogen =1.51 g/126.01 g x 100=1.198%

Carbon =18.02g/126.01 g x 100=14.300%

Oxygen =72.00g/126.01 g x 100=57.138%

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