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EMPIRICAL FORMULA AND MOLECULAR FORMULA

Authored by Almera Sales

Chemistry

12th Grade

Used 15+ times

EMPIRICAL FORMULA AND MOLECULAR FORMULA
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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the units for molar mass?

grams
amu
grams/mole
liters

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Find the percent composition of each element in N2S2 .

69.6% N, 30.4%S
15.2% N, 84.8% S
30.4% N, 69.6% S
65.2% N, 34.8% S

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molecular formula if the empirical formula is C2H5 and the molecular molar mass is 58.14 g/mol?

C2H5
C4H10
C1H2.5
C4H8

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A formula with the lowest whole # ratio of elements in a compound is called

empirical formula
chemical formula
covalent formula
molecular formula

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

ionic formula
covalent formula
empirical formula
molecular formula

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is the correct empirical formula for C4H10

C2H5
CH2.5
C8H20
C4H10

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

What is the equation for calculating percent composition?

mass of element/mass of compound = x 100
mass of compound/mass of element = x 100 
total mass/molar mass = x 100 
molar mass/molar mass = x 100 

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