if you have a mixture of argon gas and helium gas that has a total pressure of 67 atm, and id we know that helium makes up 28% of the mixture, what will be the partial pressure of helium?

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

Which statement best explains the relationship between an area is geography and the temperature of its surface water