A20-l flask contains a mixture of nitrogen gas and oxygen gas at 25 °c.
the total pressure of the gaseous mixture is 0.91 atm, and the mixture is
own to contain 0.050 mol n2. calculate the partial pressure of oxygen
and the moles of oxygen present.

what are the statements

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.