calculate the density of aluminum if a cylinder weighing 270grams has a volume of 100 cm cm^3. make sure to include units.

27.0 gExplanation:The density of a substance tells you the mass of exactly one unit of volume of said substance.In your case, aluminium is said to have a density ofdensity Al=2.70 g.cm−3This tells you that every 1 mL of aluminium has a mass of 2.70 g.All you have to do now is use the density of aluminium as a conversion factor to go from cubic centimenters of aluminium to grams10.0cm3⋅2.70 g1cm3=27.0 g−−−−− The answer is rounded to three sig figs.Answer link

Explanation:

the answer is c. nacl

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.