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kherson [118]
3 years ago
11

A sample of copper powder is heated in an evaporating dish using a Bunsen burner. If the mass of the powder in the evaporating d

ish increases after heating, this indicates that A. the copper must have combined with another substance. B. the copper must have lost matter. C. hot copper is more dense than cold copper. D. hot copper weighs more than cold copper.
Chemistry
1 answer:
Charra [1.4K]3 years ago
5 0

Answer : The correct option is, (A) the copper must have combined with another substance.

Explanation :

According to the question, when a sample of copper powder is heated in an evaporating dish by using Bunsen burner then the mass of the powder in the evaporating dish increases after heating that means the copper powder will be combined with the another substance.

If the mass of powder in the evaporating dish is decreases after the heating then the copper powder must have lost some matter.

The given option C and D are wrong statements because the hot copper is less dense than the cold copper and as we know that the density is directly proportional to the mass of a substance that means the hot copper weighs less than cold copper.

Hence, the correct option is, (A) the copper must have combined with another substance.

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An object has a density of 10.00 g/mL. If the object has a volume of<br> 25.00 ml, what is the mass?
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Answer:

The answer is

<h2>250 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

volume of object = 25 mL

Density = 10 g/mL

The mass of the object is

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<h3>250 g</h3>

Hope this helps you

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For Nickel, there are 5 naturally occurring isotopes. Their identities, masses and relative abundance are listed below

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To determine the average atomic mass of Nickel, the equation would be:
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Using the equation, the answer would be:
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