Review for Unit7 Chemical Reactions

Review for Unit7 Chemical Reactions

10th Grade

14 Qs

quiz-placeholder

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Review for Unit7 Chemical Reactions

Review for Unit7 Chemical Reactions

Assessment

Quiz

Chemistry

10th Grade

Medium

NGSS
HS-PS1-7, HS-LS1-6, HS-PS1-2

+2

Standards-aligned

Created by

Enos Inniss

Used 6+ times

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14 questions

Show all answers

1.

MATCH QUESTION

1 min • 5 pts

What do these equation symbols mean?

gas

(l)

yields

(s)

dissolved in water

(aq)

solid

-->

liquid

(g)

2.

MATCH QUESTION

1 min • 5 pts

Correctly identify these polyatomic ions

SO42-

ammonium

NO2-

hydroxide

OH-

nitrite

NO3-

sulfate

NH4+

nitrate

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

The reaction between solid aluminum and liquid bromine is exothermic. This reaction creates the product aluminum bromide. What equation includes the correct formulas and demonstrates conservation of mass?

Al(s) + Br₂(l) → AlBr₃(s)

Al(s) + Br(l) → AlBr(s)

Al(s) + 3Br(l) → AlBr₃(s)

2Al(s) + 3Br₂(l) → 2AlBr₃(s)

Answer explanation

solid aluminum is Al3+

liquid bromine is Br2

Tags

NGSS.HS-PS1-7

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Students perform an experiment that instantaneously forms a precipitate. They mix aqueous iron (III) nitrate and sodium hydroxide to produce iron (III) hydroxide and aqueous sodium nitrate. What is the correct balanced equation for this reaction to show conservation of mass?

3FeNO₃ + 2NaOH → FeOH₃ + 3NaNO₃

FeN + 3NaOH → FeOH₃ + 3NaN

Fe(NO₃)₃ + 3NaOH → Fe(OH)₃ + 3NaNO₃

Fe³⁺NO₃⁻ + Na⁺OH⁻ → Fe³⁺OH⁻ + Na⁺NO₃⁻

Answer explanation

iron (III) is Fe3+

nitrate is NO3-

sodium is Na+

hydroxide is OH-

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

5.

DRAG AND DROP QUESTION

1 min • 1 pt

What are the coefficients that would correctly balance this equation?

Zn +​ ​ K₂CrO₄ ⟶​ (a)   K +​ (b)   ZnCrO₄

3
0.5
2
1

Tags

NGSS.HS-PS1-7

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the reaction 2H₂ + O₂ → 2H₂O, what is the mole ratio of hydrogen to water?

2 : 2

2 : 1

1 : 2

4 : 4

Tags

NGSS.HS-PS1-7

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the reaction 2RbNO₃ → 2RbNO₂ + O₂, how many moles of O₂ are produced when 5.0 mol of RbNO₃ decompose?

1.0 mol

2.5 mol

3.0 mol

7.5 mol

Answer explanation

Based on the balanced equation

2RbNO₃ → 2RbNO₂ + O₂

the molar ratio of RbNO₃ to O₂ is 2:1 which means that every 1 mole of RbNO₃ will produce 0.5 moles of O₂

Tags

NGSS.HS-PS1-7

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