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Moles and Empirical Formulas Week 2

Authored by Layne Maki

Chemistry

9th - 12th Grade

NGSS covered

Used 11+ times

Moles and Empirical Formulas Week 2
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27 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?

Mg4N3
MgN2
Mg3N
MgN

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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

Molecular Formula
Chemical Formula
Empirical Formula 
Distance Formula

3.

MULTIPLE CHOICE QUESTION

2 mins • 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

5 mins • 1 pt

What is the molecular formula if the empirical formula is CH2O and the molecular molar mass is 180.18?

CH2O
C2H4O2
C4H8O4
C6H12O6

Tags

NGSS.MS-PS1-1

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.

 NaPO2
Na2PO3
Na3PO4
NaPO4

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the molecular formula for a compound with the empirical formula: K2SOand a molecular mass of 696g.

K2SO
K8SO16
K8S4O
K8S4O16 

7.

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

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