This problem is providing 25.55 mL of hydrogen gas that is collected with steam at 295 K and 0.987 atm. Thus, it is asked for the calculation of the gas constant R, which is derived from the ideal gas law:
[tex]PV = nRT[/tex]
Whereas we solve for R as follows:
[tex]R=\frac{PV}{nT}[/tex]
Nevertheless, the pressure of hydrogen will be equal to the barometric one minus waters, since the gas is composed by hydrogen and steam:
[tex]P=0.987atm-0.026atm=0.961atm[/tex]
Hence, we can plug in the given variables to obtain R, however, since the moles of hydrogen are not given, we can write it for you to plug that in further:
[tex]R=\frac{0.961atm*0.02555L}{n*295K} \\[/tex]
Keep in mind that if you measured grams of hydrogen, you will need to convert them to moles by dividing by its molar mass (2.02g/mol) so that you will be able to get the correct result.
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