A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density?

How many atomic mass units are equal to 1.672×10−24 g of protons?

Robert leaves a chocolate bar in his car while attending school all day. when he goes to his car in the afternoon, the bat has changed into gooey liquid. what happened to the chocolate bar

What type of reaction is this equation c2h5s + o2 > co2 + h2o + so2