Acontainer holds 15.0 g of phosphorous gas at a pressure of 2.0 atm and a temperature of 20.0 celsius. what is the density of the gas?

2.57 g/l
12.3 g/l
180 g/l
0.40 g/l

Density of the gas is 2.57 g/L.

Explanation: Converting the mass of phosphorous gas into its moles using the formula:

Given mass of phosphorous gas = 15 g

Molar mass of phosphorous gas = 31 g/mol

Using above equation, we get

Using Ideal gas equation, which is:

Given:

P = 2 atm

   (Conversion Factor: )

n = 0.484 moles (Calculated above)

 (Gas Constant)

Putting all the values in above equation, we calculate the number of moles.

V = 5.818 L

Now, to calculate density, we use the formula:

Density = 2.57 g/L

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the answer to this question is 3.