At 300 K and 1 atm, 15mL of a gaseous hydrocarbon requires 375mL air containing 20% O_(2) by volume for complete combustion. After combination the gases occupy 330 mL. Assuming that the water formed isin liquid form and the volumes were measured at the Atomic mass of boron is 10.81. it has two isotopes namely ._(5)^(11)B and ._(5)^(x)B with their relative abundance of 80% and 20% respectively. the value of x is:

At 300 K and 1 atm, 15mL of a gaseous hydrocarbon requires 375mL air c

1.	At 300 K and 1 atm, 15mL of a gaseous hydrocarbon requires 375mL air containing 20% O_(2) by volume for complete combustion. After combination the gases occupy 330 mL. Assuming that the water formed isin liquid form and the volumes were measured at the Atomic mass of boron is 10.81. it has two isotopes namely ._(5)^(11)B and ._(5)^(x)B with their relative abundance of 80% and 20% respectively. the value of x is:
Answer» 10.05 10 10.01 10.02 Answer :B