Percent Composition and Hydrates

Percent Composition and Hydrates

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video continues the lesson on percent composition, focusing on calculating the amount of hydrogen in water and introducing hydrates. It explains how to determine the water content in hydrates and provides assignment instructions.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main topic discussed in the introduction of the lesson?

Percent composition

Molar mass calculation

Chemical reactions

Atomic structure

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you calculate the amount of hydrogen in a given mass of water?

By using the density of water

By using the atomic number of hydrogen

By using the percent composition of hydrogen

By using the molar mass of water

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the significance of significant figures in the calculation of hydrogen in water?

They are used to calculate molar mass

They help in balancing chemical equations

They are not important

They determine the accuracy of the result

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a hydrate?

A compound that contains only hydrogen

A compound that releases oxygen

A compound that traps water molecules

A compound with no water

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does 'anhydrous' mean in the context of hydrates?

No hydrogen present

Contains hydrogen

No water present

Contains water

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the percent of water in a hydrate change with more water molecules?

It remains the same

It increases

It decreases

It becomes zero

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the percent of water in copper(II) chloride dihydrate?

25.00%

15.00%

21.13%

11.32%

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