What is the empirical formula of a compound that is 85.64% carbon and 14.38% hydrogen by weight?

1 Determine the empirical formula of the compound containing:
63.50% silver 8.25% nitrogen 28.25% oxygen

2 Determine the empirical formula of the compound containing
52.11% carbon 13.14% hydrogen 34.75% oxygen

3 What is the molecular formula of the molecule that has an empirical formula of CH2O molar mass of g/mol?

4 A compound with a formula mass of 42.08 amu is found to be
85.64% carbon and 14.36% hydrogen by mass. Find its molecular formula

5 Chemical analysis shows that citric acid contains 37. 51% C, 4
Chemical analysis shows that citric acid contains 37.51% C, 4.20% H, and 58.29% O. What is the empirical formula for citric acid?

6 The percent composition of diborane contain 78. 1% B and 21. 9% H
The percent composition of diborane contain 78.1% B and 21.9% H. What is the empirical formula?

7 An unknown substance contained 0. 5219g N, and 1. 4904g O
An unknown substance contained g N, and g O. Determine its empirical formula.

8 Styrene has an empirical formula of CH
Styrene has an empirical formula of CH. It has a molecular weight equal to 104 amu. Determine it’s molecular formula.

9 What is the empirical formula if the compound consist 21. 2% N 6
What is the empirical formula if the compound consist 21.2% N 6.1% H 24.2% S 48.5% O

10 Empirical formula of a substance is CH2O. Molar mass is 180
Empirical formula of a substance is CH2O. Molar mass is 180. What is the molecular formula?

11 Find the empirical formula for a substance with 88. 8% copper 11
Find the empirical formula for a substance with 88.8% copper 11.2% oxygen

12 Find the empirical formula for a substance with
40% carbon 6.7% hydrogen 53.3% oxygen

13 Find the empirical formula for a substance with
92.3% carbon 7.7% hydrogen

14 Find the empirical formula for a substance with 70. 0% iron 30
Find the empirical formula for a substance with 70.0% iron 30.0% oxygen

15 Find the empirical formula for a substance with 5. 88% hydrogen 94
Find the empirical formula for a substance with 5.88% hydrogen 94.12% oxygen

16 A compound with empirical formula of NO2 has a molar mass of 92 g/ml. Find molecular formula

17 A compound with molar mass of g/ml. 39.97% C 13.41% H 46.62% N Find molecular formula

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Indiana University Bloomington

Chad G.

Chemistry 101

2 months, 2 weeks ago

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Two compounds have the same composition: $85.62 \% \mathrm{C}$ and $14.38 \% \mathrm{H} .$ Obtain the empirical formula corresponding to this composition. One of the compounds has a molecular weight of 28.03 amu; the other, of 56.06 amu. Obtain the molecular formulas of both compounds.