The crystals of a mineral are always the same size. select the best answer from the choices provided t f

False.

Explanation:

The crystals of minerals are not always in the same size. They vary in their sizes. Some of them are large and some of them are extremely small.

The size of the crystals depends on the time it takes for cooling. If the crystals are cooled down very fastly then the size of the crystals is small.

If the crystals are cooled down slowly then the size of crystals are larger in size as compared to that of other crystals.

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 :

just did the assignment and the answer was #1 +2 n