Matter 7th Grade

Matter 7th Grade

7th - 8th Grade

18 Qs

quiz-placeholder

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Matter 7th Grade

Matter 7th Grade

Assessment

Quiz

Chemistry

7th - 8th Grade

Practice Problem

Hard

Created by

luis aguilar

Used 66+ times

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18 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

We prepare a 70 g solution of ethanol in 100 ml of water. Look for the density of ethanol in your book in order to calculte the concentration of this solution in g/L. Round off your answer to the units.

370.53 g/L

371 g/L

371 g/m3

None of the above.

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Calculate the concentration of a solution consisting in 10 g of salt in 250 mL of water.

40 g/L

39

41 g/L

None of the above.

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

We have 6 m3 of water on a pool. How many 21L jars would we need to fill it.

285.71 jars

285.72 jars

285 jars

286.71 jars

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

Look at the photo and select what type of mixture is in each container.

Solution & Colloid

Homegenuos & Sea water

Suspension & precipitate

None of the above.

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

What is this effect called?

Tyndall effect

Light dispersion

Lazer test

None of the above.

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Match each description to its fluid:Homogeneous in appearance, it can be separated into several substances by applying heat.

Compound.

Solution.

Simple substance.

Heterogeneous mixture.

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Match each description to its fluid:A pure substance formed by the same type of atoms.

Compound.

Solution.

Simple substance.

Heterogeneous mixture.

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