Cho 2,7g Al phản ứng vừa đủ với dung dịch H2SO4 20%. a) Tính thể tích khí thu được ở đktc.
b)Tính khối lượng dung dịch H2SO4 20% cần dùng.
c)Tính nồng độ phần trăm của dung dịch thu được sau phản ứng

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

elements make up everything, and they combine to make compounds.

the answer is c

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.