3 years ago

The density of a material is a/n

1 answer:

7 0

Answer:

Density is a measurement that compares the amount of matter an object has to its volume. An object with much matter in a certain volume has high density.

Explanation:

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Solid, liquid, and gas.

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4 years ago

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a. A solution of potassium dichromate is reduced to chromium(III) ions by zinc metal in the presence of an acid causing the solu

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Explanation:

It is known that molecular formula of potassium dichromate is $K_{2}Cr_{2}O_{7}$ . As potassium has an oxidation state of +1 and an oxygen atom has an oxidation state of -2.

Let the oxidation state of chromium is x. Therefore, calculate the oxidation state of chromium as follows.

$K_{2}Cr_{2}O_{7}$ = 0 (as the molecule is neutral)

$(2 \times 1) + 2x + (-2 \times 7)$ = 0

2 + 2x - 14 = 0

x = +6

Thus, we can conclude that the oxidation state of the chromium in the potassium dichromate molecule is +6.

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4 years ago