4. A sample of gas occupies a volume of 3.50 L at 48.0°C. At what temperature is the volume of the
gas 8.00 L if the pressure is kept constant.

(Use Charles gas law)

the answer is c

tell me if wrong

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.