A monocristal of CsCl weighs 260 g. Immersed in a beaker filled to the brim with petrol, it causes overflow of 65.5 cm3 liquid. Calculate (answers at the bottom): - the molar mass of CsCl. - the mass density of CsCl. - the molar volume of CsCl. - the number of cations (or anions) per unit cell. - the number of unit cells per mole. - the volume $V$ of one unit cell. - the length of the edge $a$ of one unit cell.