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3 years ago

1. Which liquid sample is a pure substance?

Chemistry

1 answer:

IRISSAK [1]3 years ago

6 0

The whole Activity , poem and paragraph is missing in the question.

Answer:

(1) Liquid A

(2) Solid A

Explanation:

Using this part of the given poem

Substances and mixtures behave differently,

During boiling and melting most especially

Boiling point of substance is fixed while mixture is not

Substance melts completely but mixture does not

The boiling point of the Pure substance remain fixed after reaching its boiling point this is shown by Liquid A

Solid A is melting completely so Solid A is a pure substance.

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Answer:

45K

Explanation:

Rise in temperature = Final - initial temperature.

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T2+273 -T1-273 =?

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3 years ago

A woman has a body mass of 53 kg. What is her mass in grams?

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Answer:

53000 grams

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2 years ago

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The density of copper decreases as temperature increases (as does the density of most substances). Which change occurs in a samp

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Answer: Option (c) is the correct answer.

Explanation:

As we know that density the amount of mass present in per unit volume.

Mathematically, Density = $\frac{mass}{volume}$

So, it means that density is inversely proportional to volume. Hence, when there will be decrease in density of a substance then there will be increase in its volume. That is, expansion of substance will take place.

Also, boiling point of copper is 2,562 degree celsius but we are heating it up to a temperature of 95 degree celsius. This means that copper will remain in liquid state at this temperature.

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3 years ago

A certain type of decorative lamp contains colored liquids. These liquids form globs that break off and rise to the top of the l

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Answer:

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