Chemical Equation: SiO2 + 3C = SiC + 2CO

When 90.0 g of silicon dioxide is heated with an excess of carbon, 41.0 g of silicon carbide is produced. What is the percent yield of this reaction? (find the theoretical amount of SiC using stoichiometry, then calculate percent yield)

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.

The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?