2.7 g of aluminum are reacted with 40.8 g of sulfur. the product formed is aluminum sulfide. write the balanced equation of the reaction​

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.

A2.5% (by mass) solution concentration signifies that there is a 2.5 % (by mass) solution concentration signifies that there is blank of solute in every 100 g of solution. of solute in every 100 g of solution

Can anyone answer these questions? ? i need it before 1: 00pm today