Which component in this mixture has the lowest density? a. glass. b. water. c. sawdust. d. sand

Does anyone know a lot about how to: - calculate mass of magnesium metal - calculate the actual yield of magnesium oxide - calculate the theoretical yield of mgo - calculate the percent yield of mgo - determine the percent yield of mgo - determine the average percent yield of mgo i had to do an online lab and its asking these questions but i have no idea where to start or how to be able to find these things. i can post the chart of the data from the lab or if you can tell me exactly how i can find each.

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

Which suspect most likely committed the robbery and how do you know