Water is made of hydrogen and oxygen in the ratio of 2 hydrogen
atoms: 1 oxygen atom. What type of substance is water?
Select one:
Element
Atom
Molecule
Mixture

A atom

Explanation:

Molecules are made up of even smaller particles! These are called atoms. Each water molecule is made of three atoms, two hydrogen atoms and one oxygen atom. In fact every object in your surroundings is made of atoms.

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 :

pv=nrt

explanation: