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sergejj [24]
3 years ago
12

A student heated a blue copper sulfate crystal in a test tube. After a few minutes, she observed that the crystal turned white a

nd the inside of the test tube was covered with a thin film of water. The water inside the test tube most likely __.
Multiple choice question.

seeped through the sides of the test tube


was left from cleaning the test tube the night before


condensed from the air around the test tube


came from the blue copper sulfate crystal, which is a hydrate
Chemistry
1 answer:
kolezko [41]3 years ago
5 0

The water from inside the test tube most likely came from the blue copper sulfate crystal which is a hydrated salt.

<h3>Hydrated salts</h3>

Hydrated salts contain water of hydration.

A blue copper sulfate crystal contains water of hydration.

When heated, the water evaporates off to give an anhydrous salt which appears colorless.

The equation of the reaction is as follows:

CuSO4•5H2O -----> CuSO4 + 5H2O(g)

More on water of hydration can be found here: brainly.com/question/919417

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A;4, b;6, c;7, d;5, e;8, f;3
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The arrangement of things in the order that they occurred.
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Duncan takes a break from studying and goes to the gym to swim laps If swimming burns amount of time ? 85 * 10 ^ 5 cal per hour
Volgvan

When 6.85×10⁵ cal is converted to kilojoules, the result obtained is 2866.04 KJ

<h3>Data obtained from the question </h3>
  • Energy (cal) = 6.85×10⁵ cal
  • Energy (KJ) =?

<h3>Conversion scale </h3>

1 cal = 0.004184 KJ

<h3>How to convert 6.85×10⁵ cal to kilojoules</h3>

1 cal = 0.004184 KJ

Therefore,

6.85×10⁵ cal = 6.85×10⁵ × 0.004184

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6 0
2 years ago
Which of the following items is a salt? (1 point)
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