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Anna11 [10]
3 years ago
12

A student collects 450. mL of HCl gas at a pressure of 101 kPa and a temperature of 17ºC. What would the volume of the gas be if

the temperature was increased to 25ºC and the pressure was increased to 104 kPa?
Chemistry
1 answer:
xenn [34]3 years ago
8 0

Answer:

449 mL

Explanation:

Using Ideal gas equation for same mole of gas as

\frac {{P_1}\times {V_1}}{T_1}=\frac {{P_2}\times {V_2}}{T_2}

Given ,  

V₁ = 450 mL

V₂ = ?

P₁ = 101 kPa

P₂ = 104 kPa

T₁ = 17 ºC

T₂ = 25 ºC

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15  

So,  

T₁ = (17 + 273.15) K = 290.15 K

T₂ = (25 + 273.15) K = 298.15 K

Using above equation as:

\frac {{P_1}\times {V_1}}{T_1}=\frac {{P_2}\times {V_2}}{T_2}

\frac {{101}\times {450}}{290.15}=\frac {{104}\times {V_2}}{298.15}

Solving for V₂ , we get:

V₂ = 449 mL

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Calculate the volume in cm^3 of 325.0 dg of alcohol. Alcohol has a density of 0.785g/mL.
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Answer:
106 mL

Explanation:
In order to be able to answer this question, you must understand what the density of a substance tells you.
The density of a substance is nothing more than the mass of that substance that occupies one unit of volume.
In your case, the density of ethanol is given in Grams per milliliter, which means that one unit of volume will be
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So, ethanol has a density of
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−
1
, which is equivalent to saying that if you take exactly
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of ethanol and weigh it, you will end up with a mass of
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Now, you know that the volume you're using has a mass of
83.3 g
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0.785 g
for every
1 mL
of ethanol, it follows that this much mass will correspond to a volume of
83.3
g ethanol
⋅
ethanol's density
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1 mL
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Rounded to three sig figs, the answer will be
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