Question

Please help with my chemistry homework thank you so much

Answer 1

There are 2.2 moles of hydrogen.

Step-by-step explanation:

The given information from the exercise is:

- Volume (V): 48.6L

- Temperature (T): 0°C (273K)

- Pressure (P): 1atm

1st) It is important to convert the temperature unit from °C to Kelvin:

`0+273=273K`

This first step is very important, because all the units must be at atm, L and Kelvin, before using the Ideal Gases Law formula.

2nd) Now to calculate the moles of hydrogen, we hae to replace the values of V, T and P in the Ideal Gases Law formula:

`\begin{gathered} P*V=n*R*T \\ 1atm*48.6L=n*0.082(atm*L)/(mol*K)*273K \\ 48.6atm*L=n*22.4(atm*L)/(mol) \\ (48.6atm)/(22.4(atm*L)/(mol))=n \\ 2.2moles=n \end{gathered}`

R: is the gases constant, in its value is 0.082atm.L/mol.K.

So, there are 2.2 moles of hydrogen.