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Akimi4 [234]
3 years ago
6

Calculate the mass percent composition of carbon in C3H4

Chemistry
2 answers:
adoni [48]3 years ago
8 0

Answer: 90%

Explanation:

So we need to find the molar mass of the entire compound, and the mass of carbon times the number of molecules:

Molar mass: 3*12 + 4*1 = 40

Mass of carbon: 12*3 = 36

36/40 * 100 = 9/10 * 100 = 90%

Zolol [24]3 years ago
5 0

Answer:

Calculate the molar mass of C3H4 in grams per mole or search for a chemical formula or ... Percent composition by element ... Carbon, C, 12.0107, 3, 89.937% ...

Explanation:

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A solution of sugar contains 35 gramsof sucrose, C12H22O11in 100 mL of water. What is the percent composition of the solution?
KATRIN_1 [288]

Answer:

Percent composition of the solution is 26 % of sucrose and 74 % of water

Explanation:

Percent composition is the mass of solute, either of solvent in 100 g of solution.

Mass of solution = Mass of solvent + Mass of solute

Mass of solute = 35 g

Mass of solvent = 100 g

As we know, water density = 1g/mL

So 1g/mL . 100 mL = 100 g

35 g + 100 g = 135 g → Mass of solution

(Mass of solute / Mass of solution) . 100 =

(35 g / 135 g) . 100 = 26 %

(Mass of solvent / Mass of solution) . 100 =

(100 g / 135 g) . 100 = 74 %

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The equation for carbon-14 emission by Radium-223 nuclei is given below:

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Radioactivity is the spontaneous decay of a substance with emission of radiation.

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