stoichiometry & mole concept

stoichiometry & mole concept

9th - 10th Grade

10 Qs

quiz-placeholder

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stoichiometry & mole concept

stoichiometry & mole concept

Assessment

Quiz

Science, Chemistry

9th - 10th Grade

Hard

NGSS
HS-PS1-7, HS-PS1-1

Standards-aligned

Created by

Husain Wahyd

Used 58+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Mg + H2SO4 → MgSO4 + H2

In this reaction, What is the mass of magnesium sulfate formed when 6g of magnesium react with excess sulfuric acid.

[Ar: H,1; O,16; Mg,24; S,32]

8

24

30

60

2.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

A compound X contains 82.76% of carbon by mass and 17.24 of hydrogen by mass. The empirical formula of compound X is:

C6H5

C2H5

C3H8

CH3

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Compound X has and empirical formula of C2H5 and a molecular mass of 58. The molecular formula of X is:

C6H12O6

C4H10

C2H5OH

CH3COOH

Tags

NGSS.HS-PS1-1

4.

MULTIPLE SELECT QUESTION

5 mins • 1 pt

Which two of the following contain the same number of molecules?

2.0g of Methane, CH4

8.0g of Oxygen, O2

2.0g of Ozone, O3

8.0g of Sulfur dioxide, SO2

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

4.8g of calcium is added to 3.6g of Water. The following reaction occurs.

Ca + 2H2O → Ca(OH)2 + H2

What Reagent is in excess?

Calcium

Water

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

In the same reaction where 4.8g of calcium is added to 3.6g of Water.

Ca + 2H2O → Ca(OH)2 + H2

What is the mass of the excess reagent that remained at the end of the experiment

8g

0.08g

0.8g

88g

Tags

NGSS.HS-PS1-7

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Ethanol is manufactured from Glucose C6H12O6 by fermentation

C6H12O6 2C2H5OH + 2CO2

In an experiment, 30.0g of glucose was fermented.

What is the number of moles of glucose in 30.0g

0.157

0.167

0.186

0.159

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