Density = mass divided by volume. 15/30 is 1/2 so the density is 1/2 or 0.5 g/cm
The four bonds of carbon tetrachloride (CCl4<span>) are </span>polar, but the molecule isnonpolar<span> because the bond polarity is canceled by the symmetric tetrahedral shape. When other atoms substitute for some of the Cl atoms, the symmetry is broken and the molecule becomes </span>polar
The answer is D; Mass and Velocity
The carbon cycle. (Most likely, I'm unsure)