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olganol [36]
3 years ago
5

The average atomic mass of zinc is 65.37 amu, and it's atomic number is

Chemistry
1 answer:
yKpoI14uk [10]3 years ago
5 0

Answer:

30

Explanation:

The number of protons determines an element's atomic number and is used to distinguish one element from another. ... Together, the number of protons and the number of neutrons determine an element's mass number.

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. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).

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How many moles (of molecules or formula units) are in each sample?
Alexus [3.1K]

The number of moles in each sample will be 0.391 moles, 30.7 moles, 0.456 moles, and 1350 moles

<h3>What is the number of moles?</h3>

The number of moles of a substance is the ratio of the mass of the substance to the molar mass.

In other words; mole = mass/molar mass.

Thus:

  • moles of 18.0 g NO_2 = 18.0/46

                                   = 0.391 moles

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  • moles of 191.8 kg Na_2SO_4 = 191800/142

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More on the number of moles of substances can be found here: brainly.com/question/1445383

#SPJ1

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