Empirical Formula and Percentage Composition

Quiz
•
Science
•
11th Grade
•
Hard
+2
Standards-aligned
Lisa Thompson
FREE Resource
25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find the percent composition of Cu2S?
%Cu= 67.987 %S= 32.013
%Cu= 79.854 %S= 20.145
%Cu= 35.946 %S= 64.054
Tags
NGSS.HS-PS1-7
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?
Mg4N3
MgN2
Mg3N2
MgN
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is considered an empirical formula?
CH3COOH
C6H12O6
H2O
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A formula with the lowest whole # ratio of elements in a compound is called
Molecular Formula
Chemical Formula
Empirical Formula
Distance Formula
5.
LABELLING QUESTION
1 min • 1 pt
How would you calculate the percentage of Hydrogen?
2
18
16
100
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the percent by mass of magnesium in MgO?
20%
40%
50%
60%
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the approximate percent by mass of magnesium in MgO?
20%
40%
50%
60%
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