Answer compare 1 mole of h2, 1 mole of o2, and 1 mole of f2. (a) which has the largest number of molecules? explain why. (b) which has the greatest mass? explain why.

Given-

one mole of , one mole of and one mole of .

a)  As each mole consists of same number of atoms or molecules i.e.

(6.022 ×)  , therefore one mole of , one mole of and one mole of have same number of molecules.

b) Mass of 1 mole of substance is known as its molar mass.

Thus , mass of 1 mole of = 2× (1.0 g/mol) = 2.0 g/mol

Mass of 1 mole of = 2× (16.0 g/mol) = 32.0 g/mol

Mass of 1 mole of = 2× (19.0 g/mol) = 38.0 g/mol

Therefore, 1 mole of ha sthe highest mass among the given options.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :