
Chemical Quantities
Authored by Alexandra Caldwell
Science, Chemistry
10th - 11th Grade
NGSS covered
Used 39+ times

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27 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the percent composition by mass of sulfur in the compound MgSO4 (gram formula mass = 120 g/mol)?
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
In which compound is the percent composition by mass of Cl equal to 42%?
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the percent by mass of N in (NH4)2S?
47.1%
68.1%
44.1%
41.1%
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which pair has the same empirical formula?
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Find the percentage composition of Mg in Mg3(PO4)2.
27.48% Mg
43.11% Mg
16.00% Mg
12.63% Mg
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which list of number of atoms in MgF2 is right?
Tags
NGSS.MS-PS1-1
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A formula with the lowest whole # ratio of elements in a compound is called
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