The 30.6-g sample of the compound x2o3 contains 14.4 g of oxygen atoms. what is the molar mass of element x?

27 g/mol

Explanation:

To calculate the molar mass of element X, we need to calculate the mass in a given number of moles.

30.6 g - 14.4 g = 16.2 g of X

Thus, the molar mass of element X is

16.2 g / 0.60 mol = 27 g/mol

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 :