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Mole and Quantitative Chemistry

Authored by Lance Reagan

Chemistry

9th Grade - University

NGSS covered

Used 21+ times

Mole and Quantitative Chemistry
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25 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

In the following equation, what is the molar ratio between hydrochloric acid and copper(II) oxide?


2 HCl + CuO → CuCl2 + H2O

1 : 2

2 : 1

1 : 1

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

In an experiment, the actual yield is 8.4 g but the theoretical yield is 17.0 g. what is the percentage yield?

24.7 %

50.6 %

49.4 %

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

When the equation below is balanced, what is the coefficient for oxygen?


__C2H2(g) + __O2(g) → __ CO2(g) + __ H2O(g)

2

3

4

5

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Ethyne, C2H2, reacts with oxygen according to the equation below. What volume of oxygen (in dm3) reacts with 0.40 dm3 of C2H2? (STP)


2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(g)

0.40

0.80

1.0

2.0

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How many oxygen atoms are present in 0.0500 mol carbon dioxide?

3.01×1022

6.02×1022

6.02×1023

1.20×1024

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What mass (g) of potassium hydroxide (KOH) is needed to make up 500 cm3 of a solution of concentration 0.2 mol.dm-3?

2.8

11.2

5.6

0.56

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What mass of CO2 will be produced when 50 g of CaCO3 decomposes?


CaCO3 → CO2 + CaO

22 g

44 g

11 g

33 g

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