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s344n2d4d5 [400]
1 year ago
12

Calculate the percentage by mass of nitrogen in magnesium nitrate. You will need the information below. Give your answer to the

nearest whole percentage (e.g. 34%).

Chemistry
1 answer:
lianna [129]1 year ago
7 0

From the calculations, the percentage by mass of the nitrogen is 18.9 %..

<h3>What is the percentage by mass?</h3>

The term percentage by mass refers to the mass of an atom that is contained in a compound.

Hence, the compound magnesium nitrate has the formula Mg(NO3)2. The molar mass of the compound is 24 + 2(14 + 3(16)) = 148 g/mol.

The percentage by mass of nitrogen is; 28/ 148  * 100/1 = 18.9 %.

Learn more about percentage by mass:brainly.com/question/16885872

#SPJ1

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A gas exerts a pressure of 0.62 atm. Convert this to kPa and mmHg. Be sure to show your work.
IRINA_888 [86]

Answer:

The answer to your question is 0.62 atm = 62.82 kPa = 471.2 mmHg

Explanation:

Data

P = 0.62 atm

P = ? kPa

P = ? mmHg

Process

1.- Look for the conversion factor of atm to kPa and mmHg

 1 atm = 101.325 kPa

1 atm = 760 mmHg

2.- Do the conversions

                  1 atm ----------------- 101.325 kPa

                  0.62 atm ------------  x

                   x = (0,62 x 101.325) / 1

                  x = 62.82 kPa

                   1 atm ------------------ 760 mmHg

                   0.62 atm ------------  x

                   x = (0.62 x 760)/1

                   x = 471.2 mmHg                

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3 years ago
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Answer:

Yes

Explanation:

7 0
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In a chemical equation the sum of the masses
monitta
The sum of the masses of the reactants must equal the sum of the masses of the products; as required by 
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What mass of Ca(NO3)2 is equal to 0.75 moles of this substance?
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Answer:

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Explanation:

Hope this helps

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Ilia_Sergeevich [38]

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Explanation:

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