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inysia [295]
3 years ago
15

Please explain this to me! Thank you! :)

Chemistry
1 answer:
Anettt [7]3 years ago
6 0

Answer: e. 2:1:2

Explanation: This is a synthesis reaction with a generic expression of A + B => AB.

2 Mg + O2 => 2 MgO

So the ratio is 2: 1:2

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A bottle of coke is 250.0 mL. What is the volume in cubic centimeters?
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Answer:

The volume in cubic centimeters is 250

Explanation:

The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other), the direct rule of three must be applied. To solve a direct rule of three, the following formula must be followed:

a ⇒ b

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So:

x=\frac{c*b}{a}

The direct rule of three is the rule applied in this case where there is a change of units. To perform this conversion of units, you must first know that 1 mL = 1 cubic centimeters. So, if 1 cubic centimeters is 1 mL, how many cubic centimeters equals 250 mL?

cubic centimeters=\frac{250 mL*1 cubic centimeters }{1 mL}

cubic centimeters= 250

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