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Natasha2012 [34]
3 years ago
10

Calculate the number of moles in 456 g of lead, Pb

Chemistry
1 answer:
Vlad [161]3 years ago
3 0

Answer:

Number of moles = 2.2 mol

Explanation:

Given data:

Number of moles of lead = ?

Mass of lead = 456 g

Solution:

Formula:

Number of moles = mass/ molar mass

Molar mass of lead = 207.1 g/mol

Now we will put the values in formula:

Number of moles = 456 g/ 207.1 g/mol

Number of moles = 2.2 mol

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Which of the following statements is true?
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Question 9
Evgesh-ka [11]

Answer:

0.382 atm

Explanation:

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----------------------  x  ------------------------  =  0.341 moles CO₂
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To find the pressure, you need to use the Ideal Gas Law equation.

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In this equation,

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-----> V = volume (L)

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-----> T = temperature (K)

After you convert Celsius to Kelvin, you can plug the given and calculated values into the equation and simplify to find the pressure.

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n = 0.341 moles

PV = nRT

P(20 L) = (0.341 moles)(0.08206 atm*L/mol*K)(273.15 K)

P(20 L) = 7.64016

P = 0.382 atm

7 0
2 years ago
When the atmosphere has too much carbon dioxide in it, the oceans absorb some of it to achieve a new balance. This is an example
Nana76 [90]
Answer: sphere interaction

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3 years ago
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