#2 Practice Test 21. A hydrate, CASO, xH,O, weighing 5.00 grams was heatedto dryness. After heating, 3.01 grams of the anhydrate,CaSO,, remain. What is the formula of the hydrate (x-?)?PracticeThompsonThompso.1. A hyato dryiCaSO,2. Determine the molecular formula of a substance thatcontains 26.7% P, 12.1% N, 61.2% Cl, and has a molecularmolar mass of 575 grams/ mole.swer:3. In the combustion of 11.5 grams of a substance containingC, H, and O, 22.0 grams of CO, and 13.5 grams of waterwere produced. What is the empirical formula of thesubstance?miner4. In the combustion analysis of 47.5 milligrams of anunknown containing C, H, and N, 110.0 milligrams of CO,and 22.5 milligrams of water were formed.a. What is the empirical formula of this unknown?b. If the molecular mass of the unknown is 399 grams/mole, what is the molecular formula of the unknown?

Molecular formula of a substance represents the actual number of atoms present in the formula of a…

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Chemistry

#2

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

Practice Test 2
1. A hydrate, CASO, xH,O, weighing 5.00 grams was heated
to dryness. After heating, 3.01 grams of the anhydrate,
CaSO,, remain. What is the formula of the hydrate (x-?)?
Practice
Thompson
Thompso.
1. A hya
to dryi
CaSO,
2. Determine the molecular formula of a substance that
contains 26.7% P, 12.1% N, 61.2% Cl, and has a molecular
molar mass of 575 grams/ mole.
swer:
3. In the combustion of 11.5 grams of a substance containing
C, H, and O, 22.0 grams of CO, and 13.5 grams of water
were produced. What is the empirical formula of the
substance?
min
er
4. In the combustion analysis of 47.5 milligrams of an
unknown containing C, H, and N, 110.0 milligrams of CO,
and 22.5 milligrams of water were formed.
a. What is the empirical formula of this unknown?
b. If the molecular mass of the unknown is 399 grams/
mole, what is the molecular formula of the unknown?

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