Please help identify these properties and correct labels! Thank youuu in advance

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

Write 5 in the form of a/b using integers to show it as a rational number

5. divide and simplify if possible. √250x16√2x 6. what is the solution of the equation? √2x+13−5=x