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2 years ago

How much lead (pb) is in 5.07 × 1012 atoms of lead? answer in units of mol?

Chemistry

1 answer:

Butoxors [25]2 years ago

4 0

Answer:

2.49⋅10−12moles Pb

Explanation:

Before doing any calculations, it's worth noting that atoms do not contain moles, it's the other way around.

A mole is simply a collection of atoms. More specifically, you need to have exactly 6.022⋅1023 atoms of an element in order to have one mole of that element - this is known as Avogadro's number.

In your case, you must determine how many moles of lead would contain 1.50⋅1012atoms of lead.

Well, if you know that one mole of lead must contain 6.022⋅1023 atoms of lead, it follows that you get 1.50⋅1012 atoms of lead in

1.50⋅1012atoms of Pb⋅1 mole Pb6.022⋅1023atoms of Pb=2.49⋅10−12moles Pb

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an oxygen tank used for scuba diving has. avolume of 12.0 L .If the pressure of the tank is known to be 204.047 atm and the temp

Lapatulllka [165]

Answer: 101 moles of oxygen are contained in the tank

Explanation:

According to ideal gas equation:

$PV=nRT$

P = pressure of gas = 204.047 atm

V = Volume of gas = 12.0 L

n = number of moles = ?

R = gas constant = $0.0821Latm/Kmol$

T =temperature = $22.0^0C=(22.0+273)K=295K$

$n=\frac{PV}{RT}$

$n=\frac{204.047atm\times 12.0L}{0.0821 L atm/K mol\times 295K}=101moles$

Thus 101 moles of oxygen are contained in the tank

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2 years ago

HELP!! b. At the equivalence point, all of the acid has been neutralized by the base. Why does the pH change so

CaHeK987 [17]

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2 years ago

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Leokris [45]

Answer:

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There are several different types of greenhouse gases. The major ones are carbon dioxide, water vapor, methane, and nitrous oxide. These gas molecules all are made of three or more atoms. The atoms are held together loosely enough that they vibrate when they absorb heat. Eventually, the vibrating molecules release the radiation, which will likely be absorbed by another greenhouse gas molecule. This process keeps heat near the Earth’s surface. Most of the gas in the atmosphere is nitrogen and oxygen, which cannot absorb heat and contribute to the greenhouse effect.

Explanation:

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2 years ago

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nevsk [136]

Answer:

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Explanation:

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2 years ago

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