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
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Calculate the molecular mass of carbon monoxide (CO) by adding the atomic mass of carbon and the atomic mass of oxygen. Show your work.

Transcribed Image Text:In chemistry, the mole (mol) is defined as an amount of a substance that contains 6.02x 10³ particles of
that substance. This number, called Avogadro's number, is special because this number of particles has a
mass in grams that is equal to the mass in universal mass units of a single particle of the substance.
Question
How do scientists find the molecular mass and molar mass of a substance?
Calculate
The molecular mass of a molecule is the sum of the masses of each atom in the molecule. The unit of mo-
lecular mass is the universal mass unit (u). For example, the atomic mass of iron is 55.85 u, the atomic
mass of carbon is 12.01 u, and the atomic mass of oxygen is 16.00 u.

Transcribed Image Text:New equation
1 mol Fe203
1 mol Fe203
1 mol Fe,03
3 mol CO
2 mol Fe
3 mol CO2
Fe,0, (s) + 3CO (g) → 2Fe (s) + 3CO, (g)
3 mol CO
3 mol CO
2 mol Fe
2 mol Fe
3 mol CO2
3 mol CO2
New question
1 mol Fe2O3
1 mol CO
1 mol Fe
159.70 g Fe203
28.01 g CO
55.85 g Fe
How many moles of carbon monoxide (CO) are
required to react completely with 1.75 moles of iron
(III) oxide (Fe2O3)?
1 mol CO2
1 mol Fe203
1 mol CO
44.01 g CO2
6.02-1023
part Fe203
6.02-1023 molec CO
1 mol Fe
1 mol CO2
1 mol CO
Problems solved: 0
6.02-1023 atoms Fe
6.02-1023 molec CO2
22.41 L CO
Show units
1 mol CO2
Flip tile
Reset
22.41 L CO2
1.75 mol Fe203
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