Spring Final Practice Assessment

Spring Final Practice Assessment

9th - 12th Grade

35 Qs

quiz-placeholder

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Spring Final Practice Assessment

Spring Final Practice Assessment

Assessment

Quiz

Science

9th - 12th Grade

Practice Problem

Hard

Created by

Diana Lohrmann

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35 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many formula units are in 2.5 moles of cesium sulfite, Cs2SO3?

345.89 formula units

864.73 formula units

1.51 x 1024 formula units

2.41 x 1023 formula units

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many molecules are in 9.0 grams of potassium nitrate, KNO3?

2.95 x 10^25 molecules

9.0 x 10-1 molecules

1.5 x 1023 molecules

5.36 x 1022 molecules

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Find the molecular formula of a compound if the empirical formula is CH2O and the molar mass is 120 g/mol.

CH2O

C8H16O8

C4H8O4

C6H12O6

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the percent of calcium in calcium sulfate, CaSO4?

29.4%

23.5%

47.0%

136.15%

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the empirical formula for a compound that is 40.05% sulfur and 59.95% oxygen?

SO

SO2

SO3

SO4

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many moles of Al2O3 can be made from 3.5 moles of Al?

4 Al + 3 O2 → 2 Al2O3

1.75 moles

2.63 moles

3.5 moles

7.0 moles

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Use the balanced equation to answer the question: How many moles of Al are used to form 509.8 g of Al2O3?

4 Al + 3 O2 → 2 Al2O3

0.4 mol Al

2.5 mol Al

5.0 mol Al

10.0 mol Al

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