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Vladimir79 [104]
3 years ago
13

What gives an atom its mass?

Chemistry
1 answer:
saw5 [17]3 years ago
4 0
Almost all of the mass of an atom (more than 99%) is in its nucleus, so "atomic mass" is pretty much a measure of the size of the nucleus of an atom. The nucleus of an atom is made up of protons and neutrons. Protons and neutrons are almost exactly the same size.
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A flashbulb of volume 1.70 mL contains O2(g) at a pressure of 2.30 atm and a temperature of 18.0°C. How many grams of O2(g)
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Answer:

0.0001637 mol

Explanation:

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The higher the hydronium ion concentration of a solution, the ______ its pH.<br><br> higher or lower
andrey2020 [161]
<h3>Answer:</h3>

The higher the hydronium ion concentration of a solution, the <u>lower</u> its pH.

<h3>Explanation:</h3>
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  • We calculate pH by using;

                  pH = -log[H+]

  • The lower the pH of a solution the more acidic it is and the higher the pH the more basic or alkaline it is.
  • pH =-log[H+] =-log[H₃O+]
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For example,

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pH = -log 0.25 M

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