Whats the number of atoms in 5CaC12?

There are 70 atoms in 5CaC12

answer; /// the amount of material dissolved in a measure of liquid(concentration) the above statement is (true); /// good luck

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.