A solution of CaCl2 in water forms a mixture that is 28.5% calcium chloride by mass. If the total mass of the mixture is 729.5 g, what masses of CaCl2 and water were used

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

a) the particles of the chair are strongly held together.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).