A person walking covers 5.20 m in 10.4 s. How fast is the person moving?

Explanation:

Velocity = distance over time

where distance = 5.20 m

                   time = 10.4 s.

velocity =  5.20  m

                  10.4 s.

            = 0.50 m/s  

- aluminum and copper chloride.

- the chloride ion to separate the aluminum from the oxygen so that the aluminum can react with the copper ions (and the water molecules).

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.