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Ne4ueva [31]
3 years ago
6

Quickly Please!!!!!!

Chemistry
2 answers:
FrozenT [24]3 years ago
5 0

Answer:

n=4.1mol

Explanation:

Hello,

In this case, we can use the ideal gas equation:

PV=nRT

So we know the temperature, pressure and volume, therefore we can easily compute the required moles as shown below:

n=\frac{PV}{RT}=\frac{2.0atm*101L}{0.082\frac{atm*L}{mol*K}*600K}  \\\\n=4.1mol

Best regards.

kolezko [41]3 years ago
3 0

Answer:

4.1 moles

Explanation:

The following data were obtained from the question.

Number of mole (n) =..?

Volume (V) = 101L

Pressure (P) = 2atm

Temperature (T) = 600K

Gas constant (R) = 0.0821atm.L/Kmol

The number of mole of the gas can be obtained by using the ideal gas equation as illustrated below:

PV = nRT

2 x 101 = n x 0.0821 x 600

Divide both side by 0.0821 x 600

n = (2x 101) / (0.0821 x 600)

n = 4.1 moles.

Therefore, the number of mole of the gas in the container is 4.1 moles

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Answer: Precision means that measurements are close to each other . Accuracy means that measurements are close to accepted value

Explanation:

Precision refers to the closeness of two or more measurements to each other.  

For Example: If we weigh a given substance five times and you get 5.0 kg each time. Then the measurement is very precise.

Accuracy refers to the closeness of a measured value to a standard or known value.

For Example: If the mass of a substance is 5.0 kg and one person weighed 4.9 kg and another person weighed 3.9 kg. Then, the weight measured by first person is more accurate.

Thus Precision means that measurements are close to each other . Accuracy means that measurements are close to accepted value.

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3 years ago
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Answer:

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Explanation:

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How many moles of water h2o are present in 75.0 g h2o?
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Calculate the number of moles of a gas that is present in a 7.55 L container at 45°C, if the gas exerts a pressure of 725mm Hg.
vovikov84 [41]

<u>Answer:</u> The number of moles of gas present is 0.276 moles

<u>Explanation:</u>

To calculate the number of moles of gas, we use the equation given by ideal gas:

PV = nRT

where,

P = Pressure of the gas = 725 mm Hg

V = Volume of the gas = 7.55 L

n = number of moles of gas = ?

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Putting values in above equation, we get:

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Hence, the number of moles of gas present is 0.276 moles

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