A mass of 50g of calcium carbonate is heated, releasing carbon dioxide and calcium oxide. Which of these recorded masses of products is
possible, according to the Law of Conservation of Mass?

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.

Use the measurements in the table to determine which unidentified metal has the highest density. metal volume mass a 10.5 cm3 122 g b 14.2 cm3 132 g c 16.1 cm3 115 g d 12.7 cm3 126 g