Unit 1.1 Chemistry

Unit 1.1 Chemistry

10th Grade

10 Qs

quiz-placeholder

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Unit 1.1 Chemistry

Unit 1.1 Chemistry

Assessment

Quiz

Chemistry

10th Grade

Practice Problem

Hard

NGSS
HS-PS1-7, HS-PS1-2

Standards-aligned

Created by

Charles Martinez

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

A compound contains 1.00 mol of Sb. 1.50 mol C and 4.50 mol of O What is the empirical formula?

SbCO

Sb2C3O9

SbC1.5O4.5

SbC3O9

Tags

NGSS.HS-PS1-7

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of HgHCO3

229.61 g/mol

287.65 g/mol

378.40 g/mol

261.6 g/mole

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following nickle compounds contains the highest percentage nickle by mass?

NiCl2

NiO2

NiO

Ni3(PO4)2

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A compound has the empirical formula of PBr5, it has a molecular formula mass of 431 g/mol. What is the molecular formula of this compound?

P2Br10

PBr5

P3Br15

P4Br20

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A 5.0g sample of MgCl2 may contain measurable amounts of other compounds as impurities. Which of the following quantities is (are) needed to determine that the sample is pure MgCl2?

The color and density of the sample

The mass of Mg in the sample only

The number of moles of Cl in the sample only

The mass of Mg and the mass of Cl in the sample

Tags

NGSS.HS-PS1-7

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A sample of CaCO3 (molar mass 100. g) with additional impurities was reported as being 30. percent Ca. Assuming no calcium was present in the impurities, the percent of CaCO3 in the sample is

30%

40%

70%

75%

100%

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

According to the information in the table, a 1.00 g sample of which of the following contains the greatest mass of oxygen?

Na2O

MgO

K2O

CaO

Tags

NGSS.HS-PS1-7

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