What is the concentration of hydroxide in a solution with a pOH of 9.8?
ph+pOH=14 [OH-]=10^-pOH

Nonpoint source pollution is difficult to control because it

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?

Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]