Empirical Formulas Lesson

Empirical Formulas Lesson

11th - 12th Grade

6 Qs

quiz-placeholder

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Empirical Formulas Lesson

Empirical Formulas Lesson

Assessment

Quiz

Chemistry

11th - 12th Grade

Hard

NGSS
HS-PS1-7

Standards-aligned

Created by

Charles Martinez

FREE Resource

6 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A formula with the lowest whole # ratio of elements in a compound is called
Molecular Formula
Chemical Formula
Empirical Formula 
Distance Formula

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is considered an empirical formula?
CH3COOH
C6H12O6
H2O

H2O2

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which pair has the same empirical formula?
NaCrO4 and Na2Cr2O7
C2H4O2 and C6H12O6
C3H6Oand C2H6O2
CH4 and C2H6

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

How many sodium ions are there in 2.5 mol of NaCl?

1.5 x 1024 ions

1.5 molecules

6.022 x 1023 ions

3.0 x 1024 molecules

Answer explanation

2.5 mol of NaCl contains 2.5 mol of sodium ions and 2.5 mol of chloride ions.

If making 5 mol out of 2.5 mol here doesn't make sense to you, please inform your teacher.

5.

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

Answer explanation

Media Image

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

1.00 grams of a compound containing copper and chlorine was found to contain 0.524 grams of copper. Determine the empirical formula.

CuCl

CuCl2

CuCl1.97

Cu2Cl

Answer explanation

Media Image

Tags

NGSS.HS-PS1-7