HC Quiz A: Percent Composition, EF and MF
Authored by Sharon Lopez
Chemistry
10th Grade
Used 1+ times
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7 questions
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1.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
What is the percent composition of benzene, C6H6? Show work.
.
(a)
2.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
What is the empirical formula if you have 88.80% copper and 11.20% oxygen? Show work.
.
(a)
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
What percent of Zn3(PO4)2 is zinc? Show work.
.
33.15%
16.04%
50.80%
19.68%
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If 45.0 g of Mg react with 19.5 g of oxygen, what is the % of magnesium in the resulting compound? Show work.
.
69.8%
30.2%
43.3%
12.9%
5.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
What is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696g. Show work.
.
(a)
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula and name formula. Show work
(a)
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Analysis of ibuprofen yields a molar mass of 206g/mol, and the following composition: 75.7%C, 8.80%H, and 15.5% O. What is the molecular formula of ibuprofen? Show work.
(a)
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