Which statement explains what it means for a chemical reaction to be at equilibrium? A) The rate of the forward and backward reactions are equal.
B) The reactions stop because of a lack of reactants.
C) The reactions stop because the system can no longer carry
more products.
D) The masses of the products and reactants are equal.

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.

What effect might melting sea ice have for people who live in coastal areas?

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it