A 3.00 g mass of compound X was added to 50.0 g of water and it is found that the freezing point has decreased by 1.25 °C.
What is the molar mass of X if it has a van't Hoff factor of 3?
g/mol (Kf of water = 1.86 K. kg/mol)

b. examine and describe cells

we need the questions , i may then you.

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.