Calculate the number of moles in hydrogen Contained in 18 litres of the gas at27 degree Celsius and - Science - Matter in Our Surroundings

Question

Calculate the number of moles in hydrogen Contained in 18 litres of
the gas at27 degree Celsius and 70 cm pressure further , if the
mass of hydrogen takes as above is found to be 1 350 g Calculate
molar molecular mass of hydrogen

Geetha · Accepted Answer

According to ideal gas equationpV= nRTpV= wM × RTIts given thatp= 70 cm = 700 mm = 700760 atmV= 18 Lw= 1
350 gM= ?R= Gas constant = 0
0821 L atm /K/molT= 27 0C =27 + 273 = 300 KSubstituting all these valuespV= wM × RTM= wRTpV     =1
350 × 0
0821 × 300700760 × 18    = 2
0056 g
No of moles of hydrogen = Given mass/ molar mass = 1 350 / 2 005 =
0 6733

Calculate the number of moles in hydrogen . Contained in 18 litres of the gas at27 degree Celsius and 70 cm pressure further , if the mass of hydrogen takes as above is found to be 1.350 g. Calculate molar molecular mass of hydrogen.