Chemistry, 24.02.2020 19:47 yasyyas646646

A compound is composed of only C, H, and O. The combustion of a 0.519-g sample of the compound yields 1.24 g of CO 2 and 0.255 g of H 2O. What is the empirical formula of the compound

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Answer from: Brandikitts

$\large\boxed{\large\boxed{C_3H_3O}}$

Explanation:

1. Calculate the mass of C in 1.24 g of CO₂

$1.24gCO_2\times \dfrac{12.011gC}{44.01gCO_2}=0.3384gC$

2. Calculate the mass of H in 0.255g of H₂O

$0.255gH_2O\times \dfrac{2.016gH}{18.015gH_2O}=0.02854gH$

3. Calculate the mass of O by difference

0.519g-0.3384g-0.02854g=0.15206g

4. Convert every mass to number of moles:

C: 0.3384g / (12.011g/mol) = 0.02817 molH: 0.02854g / (1.008g/mol) = 0.02831 molO: 0.15206g / (15.999g/mol) = 0.009504 mol

5. Divide every number of moles by the least number of moles (0.009504):

C: 0.02817/0.009504 = 2.96 ≈ 3H: 0.02831 / 0.009504 ≈ 3O: 0.009504 / 0.009504 = 1

6. Those numbers are the respective subscripts in the empirical formula:

C_3H_3O

Answer from: Quest

D-no effect on the rate

Answer from: Quest

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the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).

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A compound is composed of only C, H, and O. The combustion of a 0.519-g sample of the compound yield...

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