If 3.64g of sand is separated from 5.25g of a mixture of salt and sand what is the percentage of sand in the sample

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom

Steam reforming of methane ( ch4) produces "synthesis gas," a mixture of carbon monoxide gas and hydrogen gas, which is the starting point for many important industrial chemical syntheses. an industrial chemist studying this reaction fills a 1.5 l flask with 3.5 atm of methane gas and 1.3 atm of water vapor at 43.0°c. he then raises the temperature, and when the mixture has come to equilibrium measures the partial pressure of carbon monoxide gas to be 1 .0 atm. calculate the pressure equilibrium constant for the steam reforming of methane at the final temperature of the mixture. round your answer to 2 significant digits.

Reactions in cells take place at about a. 40°c b. 0° c. 100°c d. 60°c