How much hcl exists in 172 ml of 0.95 m solution of hcl? answer in units of mol.

The molarity of HCl is 0.95 M
Molarity can be defined as the number of moles in a volume of 1 L.
amount of HCl moles in 1000 mL - 0.95
Amount of HCl moles in 1 mL - 0.95/1000
Therefore HCl moles in 172 mL - 0.95/1000 x 172
Amount of HCl - 0.16 mol

Ithink this is what you meant. the temperature at which a liquid begins to boil is called the boiling point. the boiling point of water is 212°f or 100°c.  and at that point will start to turn into steam (gas)

The answer is c) pyrite