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Empirical/Molecular, % Comp, the mole

Authored by Deonna Lynch

Chemistry

10th - 12th Grade

NGSS covered

Used 29+ times

Empirical/Molecular, % Comp, the mole
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18 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which pair has the same empirical formula?

NaCrO4 and Na2Cr2O7
C2H4O2 and C6H12O6
C3H6Oand C2H6O2
CH4 and C2H6

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the percent by mass of sodium in NaCl?

39%
61%
35%
65%

3.

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

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________

ionic formula
covalent formula
empirical formula
molecular formula

5.

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

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What are the units for molar mass?

grams
amu
grams/mole
liters

Tags

NGSS.HS-PS1-7

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the mass of 0.89 mol of CaCl2?

111 grams
0.008 grams
98.9 grams
none of the choices

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