A lever was used to lift a heavy rock. The input force was 150 N and the output force was 500 N. What was the mechanical advantage of the pulley?
O A. 3.3
O B. 0.3
O C. 650
O D. 350

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.

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

What is formed when amino acids form long chains or polymerize