Calculate the hydrogen-ion concentration [h+] for the aqueous solution in which [oh–] is 1 x 10–11 mol/l. is this solution acididc, basic, or neutral? show your work. (3 points)

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

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