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denpristay [2]
3 years ago
6

What is the charge on an electron? -1 0 +1 -2

Chemistry
2 answers:
Mama L [17]3 years ago
5 0

An electron has a negative charge of one

An neutron has no charge (hence, neutral)

An proton has a positive charge of one

~

Xelga [282]3 years ago
3 0
_____________________________

As we know that the charge of the electron is equivalent to the magnitude of the elementary charge that is (e) but bearing a negative sign.

Since, the value of the elementary charge is roughly

1.602 \: \times \: {10}^{ - 19} C

then, the charge of the electron is :

- 1.602 \: \times \: {10}^{ - 19} C

Here, C is the unit of charge is Coulomb.

So, the charge on an electron is (-1).

_____________________________
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18. The mass of a quantity of NiCl2 is 24.6 g. How many formula units are in the sample?
Charra [1.4K]

Answer is: A. 1.1 3 1023 NiCl2 formula units.

m(NiCl₂) = 24.6 g; mass of nickel(II) chloride.

M(NiCl₂) = 129.6 g/mol; molar mass of nickel(II) chloride.

n(NiCl₂) = m(NiCl₂) ÷ M(NiCl₂).

n(NiCl₂) = 24.6 g ÷ 129.6 g/mol.

n(NiCl₂) = 0.19 mol; amount of nickel(II) chloride.

Na = 6.022·10²³ 1/mol; Avogadro constant.

N(NiCl₂) = n(NiCl₂) · Na.

N(NiCl₂) = 0.19 mol · 6.022·10²³ 1/mol.

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The coefficients in front of the reactants and products in a chemical reaction represents the number of moles of reactants and products.

Every reaction is made up of equal number of moles of reactants and products. Thus, chemical equations are written in such a way to obey the law of conservation of matter.

The numbers used are usually whole numbers and the are very important in stoichiometry.

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