Empirical Formula

Empirical Formula

10th Grade

15 Qs

quiz-placeholder

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Empirical Formula

Empirical Formula

Assessment

Quiz

Science

10th Grade

Practice Problem

Hard

NGSS
HS-PS1-1

Standards-aligned

Created by

Lisa Thompson

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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the empirical formula of a substance with the molecular formula NaCl?

Na2Cl

NaCl2

NaCl

Na2Cl2

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the empirical formula of a substance with the molecular formula C2H4?

C2H2

C2H2

C1H1

CH2

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Determine the empirical formula for a compound that is 23.3% Co, 25.3% Mo and 51.4% Cl by mass. What is the empirical formula?

Co Mo Cl4

Co3Mo2Cl11

Co2MoCl3

Co2MoCl9

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A compound is 56.58% K, 8.69% C, and 34.73% O by mass. What is its empirical formula.

KCO

K2CO

KCO3

K2CO3

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A compound is 52.14%C, 13.13%H, and 34.73% O by mass. What is its empirical formula?

CH3OH

CH3CH2OH

CH3CH2CH2OH

CHO

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A compound is 27.7% Mg, 23.6% P, 48.7% O by mass. What is its empirical formula?

MgPO4

Mg3PO4

Mg3(PO4)2

Mg2(PO4)3

Tags

NGSS.HS-PS1-1

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A compound is 77.27% U, 10.4% O, and 12.3% F. What is its empirical formula?

UOF

UO2F2

U2OF

U2O2F

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