You are working at a garden centre for the summer. You lift a bag of fertilizer with a force of 143 N, and it moves upward with an acceleration of 0.762 m/s2.

Question

a: how much does the fertilizer back weigh?

Answer 1

143 = m g + m a = m (9.81+0.762)

m = 143/(9.81+.762)

weight = m g

Answer 2

An aqueous solution of HCl that is 4.000% HCl by mass has a density of
1.0181 g mL−1. What is the pH of this solution?