Which statements are true of fossil fuels?
check all that apply.
a. the burning of them contributes to global warming.
b. they produce harmful waste.
c. they come from water.
d. they are renewable.

How many moles of al3+ ions are in 1.25 moles of al2o3

What energy is it when you flip on a switch on a lamp

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.