Which of the following is a heterogeneous mixture?

a. vinegar in water
b. milk
c. oil and vinegar
d. air

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products