An ionic compound forms when calcium reacts with iodine. If a sample of the compoundcontains 7.4 x 1021 calcium ions, how many iodide ions does it contain

Below.

Explanation:

The formula for calcium iodide is CaI2.

The number of iodide ions is therefore:

2 * 7.4 x 1021

= 14.8 x 1021.

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 :