Walter buys a bus pass for $30. Every time he rides the bus, money is deducted from the value of the pass. He rode
12 times and $24 was deducted from the value of the pass.
How much does each bus ride cost?

When balancing a chemical equation:

Acontrol during an experiment. might change remains constant does not exist does change

The equation below shows the reaction of zinc with hydrochloric acid (hcl). zn (s) + 2 hcl (aq) —> zncl2 (aq) + h2 (g) what will happen if the concentration of hcl is decreased? a. more zncl2 will be produced. b. the reaction rate will slow down. c. the hydrochloric acid will become more acidic. d. the reaction will produce water instead of hydrogen gas.