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Alexus [3.1K]
3 years ago
12

This is the number of protons and neutrons i the nucleus of any atom

Chemistry
1 answer:
icang [17]3 years ago
4 0

Answer:

The mass number is defined as the total number of protons and neutrons in an atom. Consider Table below which shows data from the first six elements of the periodic table. Consider the element helium. Its atomic number is 2, so it has two protons in its nucleus.

Explanation:

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What is the molarity of 0.945 L of a solution that contains 0.227 moles of Fe(NO3)3?
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Answer:

0.2402 M

Explanation:

0.945 L sol contains = 0.227 moles

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3 years ago
What is the total pressure of air in lungs of an individual with oxygen at 100. mmHg, nitrogen at 573 mmHg, carbon dioxide at 0.
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Answer: The total pressure of air in lungs of an individual is 760.28 mm Hg

Explanation:

According to Dalton's law, the total pressure is the sum of individual pressures.

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p_{N_2} = partial pressure of nitrogen = 573 mm Hg

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putting in the values we get:

p_{total}=(100+573+40.28+47)mmHg

p_{total}=760.28mmHg

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