Students measuring the mass of a rock record 6.759 g, 6.786 g, 6.812 g, and
6.779 g. which other measurement of the block's mass would be most
precise?

a) 6.702 g
b) 6.605g
c) 6.781 g
d) 6.858g

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.