Which choice can be classified as a pure substance? A. heterogeneous mixture

B. solution

C. Homogeneous mixture

D. compound

H2so4(aq) + mg(s)—> mgso4(aq) +h2(g) which substance is the acid in the reaction?

This large tectonic plate is bounded on three sides by whats know as the ring of fire. what is the name of this tectonic plate? a) pacific plate b) eurasian plate c) north american plate d) indo- australian plate plz it's science but there's no option for science so i picked chemistry

What is the independent variable in this investigation? mass volume sample number substance density