19) The fact that water is 11.2 % hydroen and 88.8 % oxygen by mass regardless of its origin is an example ofB) law of conservation of massC) law of definite proportionsA) Dalton's atomic theory20) Write the empirical formulas for the following compound:H OHHC-O-C-HA) C,H;O2B) CH,0C) C,H,O21) Write a sentence that describes how to determine the number of moles of a compound in a known mass of thecompound if we know its molecular formula.A) Use the molecular formula to find the molar mass; to obtain the number of moles, divide the molar massof the compound by the mass of compound.B) Use the molecular formula to find the molar mass; to obtain the number of moles, divide the mass ofcompound by the molar mass of the compound.C) Use the molecular formula to find the molar mass; to obtain the number of moles, multiply the mass ofcompound with the molar mass of the compound.

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Answered: 19) The fact that water is 11.2 %…

19) The fact that water is 11.2 % hydroen and 88.8 % oxygen by mass regardless of its origin is an example of, A) Dalton's atomic theory C) law of definite proportions B) law of conservation of mass

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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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.

Question

19) The fact that water is 11.2 % hydroen and 88.8 % oxygen by mass regardless of its origin is an example of
B) law of conservation of mass
C) law of definite proportions
A) Dalton's atomic theory
20) Write the empirical formulas for the following compound:
H O
HH
C-O
-C-H
A) C,H;O2
B) CH,0
C) C,H,O
21) Write a sentence that describes how to determine the number of moles of a compound in a known mass of the
compound if we know its molecular formula.
A) Use the molecular formula to find the molar mass; to obtain the number of moles, divide the molar mass
of the compound by the mass of compound.
B) Use the molecular formula to find the molar mass; to obtain the number of moles, divide the mass of
compound by the molar mass of the compound.
C) Use the molecular formula to find the molar mass; to obtain the number of moles, multiply the mass of
compound with the molar mass of the compound.

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