12. Decide which of the following is the best observation. The dog ate the bone hiding under the tree.

The dog ate the bone hiding.

The dog ate the bone.

The dog ate the bone hiding under the shady tree.

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 :

the answer is c. nacl

since electrons are negative the answer is neagtaive

gas

explanation:

smoke is the matter of a gas