A window cleaned 38 windows in 2 hours at this rate how many windows did he cleaned in 7 hours

Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

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.