The ph of a substance equals −log[h+] where [h+] is the concentration of hydrogen ions. [h+] for tomato juice is 10−4. what is the ph of tomato juice?

At 35.0°c and 3.00 atm pressure, a gas has a volume of 1.40 l. what pressure does the gas have at 0.00°c and a volume of 0.950 l? which equation should you use? p2= p1v1t2/t1v2what is the pressure of the gas? 3.92 atm these are the answers