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Softa [21]
3 years ago
14

What does an atomic number represent in an atom? number of neutrons number of protons number of electrons number of protons and

neutrons
Chemistry
2 answers:
mr Goodwill [35]3 years ago
8 0

Answer:

The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

Marina86 [1]3 years ago
8 0

Answer: I'm pretty sure the answer is Number of Protons

Explanation:

I took the k-12 test

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A boat Pulls a 60Kg water-skier with a force of 105 N, What is the skier’s acceleration?
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8 0
3 years ago
Please help! What is the molarity of 450 mL of solution containing 15 g NaCl?
siniylev [52]

Answer:

The answer to your question is 0.6 M

Explanation:

Data

Molarity = ?

Volume = 450 ml

mass of NaCl = 15 g

Process

1.- Calculate the molar mass of NaCl

NaCl = 23 + 35.5 = 58.5 g

2.- Calculate the number of moles of NaCl

             58.5 g of NaCl ------------ 1mol

                 15 g of NaCl ------------   x

                         x = (15 x 1)/58.5

                         x = 0.26 moles

3.- Calculate the molarity

Molarity = moles/volume

-Substitutiion

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-Result

Molarity = 0.6 M

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