Acontainer holds 6.4 moles of gas. hydrogen gas makes up 25% of the total moles in the container. if the total pressure is 1.24 atm. what is the partial pressure of hydrogen?
a. 0.31 atm
b. 0.93 atm
c. 5.2 atm
d. 31 atm

The  partial  pressure  of hydrogen  is 0.31 atm (answer A)

    calculation

 partial pressure of hydrogen  = moles of hydrogen/  total moles of  gas x total pressure.

moles of  hydrogen = 25% of total  moles

  that is =  25/100 x 6.4 =1.6 moles

 total  moles of gas  =  6.4 moles

partial  pressure  of hydrogen  is therefore = 1.6 moles/6.4 moles x 1.24 atm =0.31  atm

- aluminum and copper chloride.

- the chloride ion to separate the aluminum from the oxygen so that the aluminum can react with the copper ions (and the water molecules).

- lead + phosphoric acid = hydrogen + lead(ii) phosphate