How many moles are there in 9.86x10^25 molecules of co2?

164moles

Explanation:

Given parameters:

Number of molecules of CO₂   = 9.86 x 10²⁵molecules

Unknown:

Number of moles  = ?

Solution:

To solve this problem, a mole of any substance contains the Avogadro's number of particles.

In that;

        6.02 x 10²³ molecules makes up 1 mole of a substance

        9.86 x 10²⁵molecules   contains   = 1.64 x 10²moles

The number of moles is 164moles

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 :