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Stels [109]
3 years ago
5

how to find percent composition of a compound composed of 16.2 grams of calcium and 28.8 grams of chlorine

Chemistry
1 answer:
Leto [7]3 years ago
7 0

This problem is providing us with the mass of calcium and chlorine. Thus, the percent composition of each element in the compound is required and found to be 36 % for calcium and 64 % for chlorine, according to the following:

<h3>Percent compositions:</h3>

In chemistry, we can use percent compositions in order to find a relationship between the relative amount of the elements in a compound and the mass of the very same compound.

In this case, given the mass of each element (chlorine and calcium), one can simply divide it by the sum of the masses of both calcium and chlorine to obtain the following:

\% Ca=\frac{16.2g}{16.2g+28.8g}*100\%= 36\%\\\\\% Ca=\frac{28.8g}{16.2g+28.8g}*100\%= 64\%\\

Learn more about percent composition: brainly.com/question/12247957

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Inessa [10]

Answer:

The net charge on each lysine molecule would be -1.

Explanation:

  • <u>When the pH is above 2.2</u> the deprotonated form of the carboxylic acid is more present, while the amino group and side chain (which is also amino) remain protonated (with a positive charge):

R-COOH ↔ R-COO⁻

R-NH₃⁺

R'-NH₃⁺

Net charge = +1

  • <u>When pH is above 9.0</u>, the carboxyl group remains deprotonated, while the amino group is deprotonated and the side chain is protonated:

R-COOH ↔ R-COO⁻

R-NH₂

R'-NH₃⁺

Net charge = 0

  • <u>When pH is above 10.5</u>, the carboxyl group remains deprotonated, while both the amino group and the side chain are deprotonated:

R-COOH ↔ R-COO⁻

R-NH₂

R'-NH₂

Net charge = -1

So at pH=13 (which is above 10.5) the net charge is -1.

6 0
3 years ago
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lbvjy [14]

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4 years ago
Of the following gases, ________ will have the greatest rate of effusion at a given temperature. Of the following gases, _______
kolezko [41]

<u>Answer:</u> From the given gases, the greatest rate of effusion is of CH_4

<u>Explanation:</u>

Rate of effusion of a gas is determined by a law known as Graham's Law.

This law states that the rate of effusion or diffusion of a gas is inversely proportional to the square root of the molar mass of the gas. The equation given by this law follows:

\text{Rate of diffusion}\propto \frac{1}{\sqrt{\text{Molar mass of the gas}}}

It is visible that molar mass is inversely related to rate of effusion. So, the gas having lowest molar mass will have the highest rate of effusion.

For the given gases:

Molar mass of NH_3=17g/mol

Molar mass of HCl=36.5g/mol

Molar mass of CH_4=16g/mol

Molar mass of Ar=40g/mol

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The molar mass of methane gas is the lowest. Thus, it will have the greatest rate of effusion.

Hence, the greatest rate of effusion is of CH_4

8 0
4 years ago
What would the molecule CH₄ be classified as?
larisa [96]

Answer:

Alkane

Explanation:

Definition of Alkane "any of the series of saturated hydrocarbons including methane, ethane, propane, and higher members. (google dictionary)"

CH4 is methane.

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aleksandrvk [35]
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