nung nóng m gam hỗn hợp x gồm mg, al, cu trong o2 dư , thu được hỗn hợp y gồm các oxit .hoà tan hết y bằng lượng vừa đủ dung dịch hcl 1M và h2so4 0.5M, thu dượcdung dịch chứa 42.8gam hỗn hợp muối trung hoà .Biết các phản ứng xảy ra hoàn toàn. Giá trị của m là ?

Which statement is best described as a atom

Answer asap need to be answered 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.

What happens to the temperature of a substance when the average kinetic energy of its particles increases?