Molar mass Study guides, Class notes & Summaries
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Student Exploration: Moles, Avogadro, and Molar Mass Exam with Complete Solutions
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Moles, Avogadro, and Molar Mass Exam 
with Complete Solutions 
Activity: Moles, Avogadro, and Molar Mass 
Prior Knowledge Questions 
1. In the image, note a dozen eggs, a dozen donuts and a 
dozen roses. How many of each item do you have? 12 eggs, 
12 donuts, and 12 roses. 
2. Would a dozen of each object have the same mass? No 
3. Suppose you have a dozen silver atoms, a dozen oxygen atoms, and a dozen lithium atoms. 
Even though you have the same number of each, will they all have the sam...
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CHEM 162 Experiment 5: Spectrochemical Series Complete Solution 2023
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CHEM 162 Experiment 5: Spectrochemical Series Complete Solution 2023. Part A: Preparation of cis-Bis(glycinato)copper(II) monohydrate, Cu(gly)2 
·H2O 
mass CuSO4 
·5H2O g 
mass NH2CH2CO2H (glycine) g 
molar mass CuSO4 
·5H2O g/mole 
moles CuSO4 
·5H2O moles 
molar mass NH2CH2CO2H (glycine) g/mole 
moles NH2CH2CO2H (glycine) moles 
limiting reagent is 
molar mass Cu(gly)2 
·H2O g/mole 
(Note for molar mass: each glycine loses the acidic proton in order to be a bidentate ligand) 
mass Cu(gly)...
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TEST BANK for Seeley's Anatomy & Physiology 13th Edition by Cinnamon VanPutte, Jennifer Regan, Andrew Russo. All Chapters 1-29. (Complete Download) 1751 Pages
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Version 1 1 
CHAPTER 1 
1) Which technique creates a three-dimensional dynamic image of blood vessels? 
A) Digital subtraction angiography 
B) Magnetic resonance imaging 
C) Dynamic spatial reconstruction 
D) Positron emission tomography 
2) Magnetic resonance imaging is based on the movement of 
A) electrons in a magnetic field. 
B) carbons in a magnetic field. 
C) protons in a magnetic field. 
D) cells in a magnetic field. 
3) The delivery of a radioactive compound to the body to study the met...
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Molar Masses assignment and quiz exam with 100% Correct answers already graded A+
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A gas cylinder contains exactly 15 moles of oxygen gas (O2). How many molecules of oxygen are in the cylinder? 
 
4.01 × 10^22 molecules 
6.02 × 10^23 molecules 
9.03 × 10^24 molecules 
2.89 × 10^26 molecules 
9.03 × 10^24 molecules 
 
 
 
A sample of sugar (C12H22O11) contains 
1.505 × 1023 molecules of sugar. How many moles of sugar are present in the sample? Answer without doing any calculations. 
 
0.25 mol 
0.50 mol 
1.00 mol 
2.50 mol 
0.25 mol 
 
 
 
Use the periodic table to determ...
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Molar Mass exam with 100% Correct answers already graded A+
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Find the molar mass of glucose? (C6 H12 O6) 
6X12.01=72.06 
12X1.01=12.12 
6X16=96 
=180.18g 
 
 
 
Find the molar mass of Al2 (SO4)3 
2X26.98=53.96 
3X32.07=96.21 
12X16=192 
= 342.17g 
 
 
 
Find the molar mass of Ba (NO3)2 
1X137.33=137.33 
2X14.01=28.02 
6X16=96 
= 261.35g 
 
 
 
Find the percentage of Oxygen in KClO3 
1X39.10=39.10 48/122.55X100 
1X35.45=35.45 
3X16=48 =39.2% 
Molar mass= 122.55g 
 
 
 
Find the percentage of water in MgCl2 X 6H20 
1X24.31=24.31 108.12/203.33X100 
2X35.45=7...
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Chapter 7 Moles and Molar Mass exam with 100% Correct answers already graded A+
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Avogadro's Number 
in honor of Amadeo Avogadro 
() 
 
 
 
The mole (mol) 
The unit for counting atoms. 
 
The mole is a unit for counting just as a dozen or a ream or a gross is used to count. 
 
 
 
Atomic mass for an element 
The average relative mass of all the isotopes for the element. 
 
 
 
1 mole atoms = 
 
 
 
1 mole molecules = 
 
 
 
The atomic mass of an element in grams contains (2) 
The atomic mass of an element in grams contains... 
 
(1) Avogadro's number of atoms (2) and is def...
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Chemistry Test Molar Mass exam with 100% Correct answers already graded A+
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Define: Avogadro's number 
6.023x 10^23 
One mole of a pure substance 
 
 
 
Define: Empirical Formula 
elements combined in a compound with subscripts showing the smallest whole-number mole ratio 
 
 
 
Define: Molecular formula 
a formula showing the types and numbers of atoms combined in a single molecule of a molecular compound 
 
 
 
Define: Formula mass 
the sum of the average atomic masses of all the atoms represented in the formula of any molecule, formula unit, or ion 
 
 
 
Define: Mo...
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Molar masses PRACTICE TEST WITH VERIFIED SOLUTIONS.
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How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen? 
1 mol of oxygen has fewer molecules. 
 
1 mol of oxygen has more molecules. 
 
Each sample has the same number of molecules. 
 
The molecules cannot be compared without knowing the mass. 
Each sample has the same number of molecules 
 
 
What is the molar mass of CHCl3? 
48.47 g/mol 
 
83.92 g/mol 
 
119.37 g/mol 
 
121.39 g/mol 
119.37 g/mol 
 
 
Which is the formula mass of (NH4)2SO4...
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Student Exploration: Moles GIZMO ( ALL ANSWERS CORRECT )
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Student Exploration: Moles 
Vocabulary: atomic mass, Avogadro constant, conversion factor, dimensional analysis, mole, 
molar mass, molecular mass, scientific notation, significant figures, unified atomic mass unit 
Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 
1. In the image to the right, note a dozen eggs, a dozen donuts and 
a dozen roses. How many of each item do you have? 
2. Would a dozen of each object have the same mass? 
3. Suppose you have a dozen carbon atoms, a dozen...
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Chemistry: 3.4 - Molar Mass exam with 100% Correct answers already graded A+
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molar mass 
the volume of one mole of an ideal gas; equal to 22.42 liters at STP 
 
 
Standard temperature and pressure (STP) the condition 0℃ 
and 1 atmosphere of pressure 
 
 
 
molecular weight 
 
 
 
formula unit 
 
 
 
Ultimately, what is a chemical compound 
A chemical compound is, ultimately, a collection of atoms. 
 
 
 
example of chemical compound, ultimately, being a collection of atoms. 
For example, methane (the major component of natural gas) consists of molecules that each conta...