What is the mass of one mole of Cl2

71

Explanation:

mass = mole x molar mass (Mr)

        = 1 x ( 35.5 + 35.5)

        = 71

i dont know

explanation:

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.