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Gekata [30.6K]
3 years ago
7

Which statement describes the number of protons in each atom of an element? (1 point)

Chemistry
1 answer:
Ierofanga [76]3 years ago
8 0

Answer:

B.

Explanation:

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Maturity, firmness, texture, and color of lean and the amount and distribution of marbling and degree of maturity
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Calculate the percent of each component in the mixture. Show your calculations. Circle final answers.
Colt1911 [192]

Answer:

See Explanation

Explanation:

The question is incomplete; as the mixtures are not given.

However, I'll give a general explanation on how to go about it and I'll also give an example.

The percentage of a component in a mixture is calculated as:

\%C_E = \frac{E}{T} * 100\%

Where

E = Amount of element/component

T = Amount of all elements/components

Take for instance:

In (Ca(OH)_2)

The amount of all elements is: (i.e formula mass of (Ca(OH)_2))

T = 1 * Ca + 2 * H + 2 * O

T = 1 * 40 + 2 * 1 + 2 * 16

T = 74

The amount of calcium is: (i.e formula mass of calcium)

E = 1 * Ca

E = 1 * 40

E = 40

So, the percentage component of calcium is:

\%C_E = \frac{E}{T} * 100\%

\%C_E = \frac{40}{74} * 100\%

\%C_E = \frac{4000}{74}\%

\%C_E = 54.05\%

The amount of hydrogen is:

E = 2 * H

E = 2 * 1

E = 2

So, the percentage component of hydrogen is:

\%C_E = \frac{E}{T} * 100\%

\%C_E = \frac{2}{74} * 100\%

\%C_E = \frac{200}{74}\%

\%C_E = 2.70\%

Similarly, for oxygen:

The amount of oxygen is:

E = 2 * O

E = 2 * 16

E = 32

So, the percentage component of oxygen is:

\%C_E = \frac{E}{T} * 100\%

\%C_E = \frac{32}{74} * 100\%

\%C_E = \frac{3200}{74}\%

\%C_E = 43.24\%

5 0
3 years ago
Can someone help me please?
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Answer:

I did this already

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Which of the following is not a possible effect of increasing carbon dioxide levels in the atmosphere? a. increase in water cont
nikitadnepr [17]

Answer:

D. reducation of cold-related deaths

Explanation:

CO2 had nothing to do with coldness.

- CO2 would increase water pollution, ocean acidification, and logging therefore D. is the only answer that would fit.

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4 years ago
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Free points if anyone wants them
PtichkaEL [24]

Answer:

Your so kind, have a good day

Explanation:

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