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Chemistry: The Mole Flashcards | StudBud
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Chemistry: The Mole
Chemistry: The Mole
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A chemistry quiz to test your knowledge on the mole chapter.
Flashcards
10 cards
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Practice quiz
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Questions
10
Answers
1
Define molar mass.
the mass in grams of an ion
the mass in grams of a pure element
the mass in grams of a solution
the mass in grams of 1 mol of any pure substance
2
How can you tell how many moles a substance has?
the group number
the atomic mass
the coefficient
the subscript
3
Determine the percentage composition of Potassium in KMnO
4.
39.1 %
28.7 %
34.6 %
24.7 %
4
How many representative particles (atoms, molecules, ions, etc) does a mole contain?
6.02 x 1022
6.02 x 1025
6.02 x 1023
6.02 x 1024
5
The molar mass of an element is what on the periodic table?
the group number
the element number
the period number
the atomic mass
6
Determine the mass of one mole of the compound: Hg
2
Cr
2
O
7
587.2 g/mol
589.2 g/mol
584.2 g/mol
586.5 g/mol
7
Determine the number of moles in 74 g of KCl.
0.95 mol
1.03 mol
0.99 mol
0.96 mol
8
Determine the number of moles in 125 g of H
2
SO
4
.
1.04 mol
1.36 mol
1.56 mol
1.28 mol
9
Determine the number of grams in 1.70 moles of KMnO
4
.
274 g
269 g
265 g
278 g
10
How do you find percent composition?
(grams of element x 1 mol)/atomic mass of element
(moles of element x atomic mass)/ 1 mol
(mass of element in 1 mol/molar mass of compound) x 100
molecular mass/empirical formula mass
