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2 years ago

A. Electrons have a charge of_____

Chemistry

2 answers:

Mrrafil [7]2 years ago

6 0

Answer:A. Negative B. Positive C. Neutral or 0

Explanation: Electrons carries a negative charge and protons are apositively charge subatomic particles. Neutrons exhibits a neutral or 0 charge.

Dmitry [639]2 years ago

5 0

Electrons: negative
Protons: positive
Neutrons: nuetral

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If the pressure, volume, and temperature of a gas are known, which can most lik

morpeh [17]

Answer:

The molar amount of the gas.

Explanation:

If the pressure, volume, and temperature of a gas are known than molar amount can be determine.

Formula:

PV = nRT

P = pressure

V = volume

R = general gas constant

T = temperature

n = number of moles

Example:

V = 2 L, P = 1 atm , T = 273 K , R = 0.0821 atm. L/mol.K

n = PV/RT

n = 1 atm. 2 L / 0.0821 atm. L/mol.K . 273 K

n = 2 / 22.413 /mol

n = 0.09 mol

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3 years ago

What is the volume of 120 x 1022 molecules of nitric oxide gas, NO, at si B) 2.24L C) 0.0199 L D) 5.02 A) 1120 L

Allisa [31]

Answer: 44.8 L

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

Standard condition of temperature (STP) is 273 K and atmospheric pressure is 1 atm respectively.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given molecules}}{\text {Avogadro's number}}=\frac{120\times 10^{22}}{6.023\times 10^{23}}=2moles$

1 mole of $NO$ occupies volume = 22.4L at STP

Thus 2 moles of magnesium react with= $\frac{22.4}{1}\times 2=44.8L$

Thus the volume of $120\times 10^{22}$ molecules of nitric oxide gas is 44.8 L.

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2 years ago

Which compounds were classified as organic compounds according to the early chemists

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Answer:

hope it's help you ok have a good day

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