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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Transcribed Image Text:Mass Amount Using Percent Composition Example for C4H30₂:
USE DIMENSIONAL ANALYSIS WITH THE GIVEN
What mass of each element is present in 50.0 g of C₂H₂O₂?
50.0 g C,H,0₂ x 3.6405 grams hydrogen
100 grams C₂H₂O₂
1.82
50.0 g C,H,Ox 57.838 grams carbon
100 grams C,H,0₂
= 2891.9 = 28.9 grams carbon
100
50.0 g C,H,Ox 38.521 grams oxygen
100 grams C₂H₂O₂
grams hydrogen
= 182.025
100
28.9 grams carbon 1.82 grams hydrogen + 19.3 grams oxygen = 50.02= 50.0 grams total (correct sig figs)
- 1926.05 - 19.3 grams oxygen
100

Transcribed Image Text:Percent Composition Example for C4H₂O₂:
CALCULATE TOTAL NOLAR MASS
4xC-4x12.011 45.044
3xH-3x 1.008- 3.024
2x0-2x 15.999 - 31.998
83.066 g/mol
DIVIDE EACH ELEMENT MASS BY THE TOTAL MOLAR MASS
(48.044 g carbon/83.066 g C,H,O,)* 100-57.838% carbon
(3.024 g hydrogen / 83.066 g C,H,O,)* 100-3.6405% hydrogen
(31.995 g oxygen/ 83.066 g C,H,0₂)*100-38.521% oxygen
What is the percent composition of silver nitrate, AgNO,?
IXAg=1x107.9=107.9
IxN=1x14.007=14.007
3x15.999=47.997
107.9+14.007+47.9=169.9
g/mol
(107.9 g Ag/169.9 g AgNO3)*100= 63.50 silver
(14.007 g N/169.9 g AgNO3)*100= 8.2455%
Nitrogen
(47.997 g/169.9 g AgNO3)*100=28.3 %
Oxygen
Mass Amount Using Percent Composition Example for C₂H₂O₂:
USE DIMENSIONAL ANALYSIS WITH THE GIVEN
What mustach lernt be present in 30.0 5 of GM/0,7
5.CC/201
16 Là một h
2001.98 curto
1000
100
1976.25 165
215 grains carbor - 1.02 garibylow:: 133 gari zogen - 5012-115 gravi toal izar wat ng Pen
Determine the mass of each element present in
a 125.0-gram sample of this chemical.
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