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WorksheetsAP CHEM Unit 1 Day 1 Review
Total questions: 9
Worksheet time: 13mins
The average atomic mass of a newly discovered element is 10.600 amu. It has two naturally occurring isotopes. One has a mass of 10.000 and a natural abundance of 70.000%. What is the isotopic mass of the other isotope?
10.000
9.0000
12.000
11.000
A new element has two isotopes, one with a mass of 40.0 amu that is 75% abundant. The average atomic weight of the element is 40.50 amu. What is the isotopic mass of the other isotope?
40.0 amu
42.0 amu
41.0 amu
44.0 amu
108 g of an element Z reacts with oxygen to form 204 g of the oxide Z2O3. What is the element Z?
Al
Sc
Ag
Mn
Which diagram(s) best characterize(s) an element?
SELECT ALL THAT APPLY.
Box 1
Box 2
Box 3
Box 4
Box 5
Which diagram(s) best characterize(s) a compound?
SELECT ALL THAT APPLY.
Box 1
Box 2
Box 3
Box 4
Box 5
Which diagram(s) best characterize(s) a mixture?
SELECT ALL THAT APPLY.
Box 2
Box 3
Box 4
Box 5
Box 6
Which contains the largest number of atoms?
3.0 mL of CH3OH (density = 1.2g/mL)
3.0 moles of CO
3.0 mg of water
3.0x1022 molecules of nitrogen gas
Estimate the number of moles of hydrogen in 176g of pentanol, C5H11OH. The molar mass of pentanol is 88g/mol.
12 mol H
144 mol H
24 mol H
72 mol H
An Olympic medal contains 71.5% of gold by mass. How much gold could be extracted from a medal that weighs 115 grams?
0.417 mol
1.33 mol
0.817 mol
14.1 mol
