Chemistry, 05.10.2019 05:10 Bubba06

Determine the empirical formula for a compound that is 70.79% carbon, 8.91% hydrogen, 4.59% nitrogen, and 15.72% oxygen.
determine the empirical formula for a compound that is 70.79 carbon, 8.91 hydrogen, 4.59 nitrogen, and 15.72 oxygen.
c17h27no3
c18h27no2
c18h27no3
c17h26no3

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Answer from: haileyrae187

The answer to your question is: C₁₈ H₂₇ N O₃

Explanation:

Data

Carbon = 70.79 g

Hydrogen = 8.91 g

Nitrogen = 4.58 g

Oxygen = 15.72 g

Process

AT C = 12 g

AT H = 1 g

AT N = 14 g

AT O = 16 g

Carbon

12 g 1 mol

70.79 g x

x = (70.79 x 1) / 12

x = 5.9 mol of C

Hydrogen

1 g 1 mol

8.91 g x

x = (8.91 x 1) / 1

x = 8.91 mol of H

Nitrogen

14 g 1 mol

4.58 g x

x = (4.58 x 1) / 14

x = 0.33 mol

Oxygen

16 g 1 mol

15.72 g x

x = (15.72 x 1)/16

x = 0.98

Divide by the lowest number of moles

Carbon 5.9 / 0.33 = 17.9 ≈ 18

Hydrogen 8.91 / 0.33 = 27

Nitrogen 0.33 / 0.33 = 1

Oxygen 0.98 / 0.33 = 2.9 ≈ 3

C₁₈ H₂₇ N O₃

Answer from: Quest

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

Answer from: Quest

Answer:

a. energy is absorbed in the reaction.

explanation:

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

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Determine the empirical formula for a compound that is 70.79% carbon, 8.91% hydrogen, 4.59% nitrogen...

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