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katrin2010 [14]
2 years ago
13

Which of the following always changes when a substance undergoes a chemical change?

Chemistry
2 answers:
Ronch [10]2 years ago
8 0

Answer:

C

Explanation:

All chemical reactions will show a change in color.

Elenna [48]2 years ago
7 0

Answer:

C. Color of the substance.

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What is the significance of the Roman Numeral when naming binary ionic compounds?
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Answer:

Roman numbers are oxidation state of the metals

Because some elements of metals show more than one oxidation state like iron Fe2+ in ferrous and Fe3+ in ferric.

Explanation:

8 0
2 years ago
A rock that has a mass if 180 grams dropped in a graduated cylinder that was originally filled to 52ml; it now reads 62ml. What
Vlad [161]

Answer:

<h2>18 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

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volume = final volume of water - initial volume of water

volume = 62 - 52 = 10 mL

From the question we have

density =  \frac{180}{10}  \\

We have the final answer as

<h3>18 g/mL</h3>

Hope this helps you

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3 years ago
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