Which of the following is a physical blend of two or more substances with uniform composition? Select all that apply. A. Homogeneous mixture
B. Heterogeneous mixture
C. Solution
D. Pure substance

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

Type the letter that represents the correct location for each particle type below.

Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?