Seorang praktikan sedang membuat dua larutan asam kuat A bervalensi satu di laboratorium. Larutan yang pertama adalah A_{1}A 1 dengan konsentrasi 0,05 M sebanyak 50 mL dan larutan yang kedua adalah A_{2}A 2 dengan konsentrasi 0,075 M sebanyak 20 mL. Jika kedua larutan tersebut dicampurkan, maka pH campuran tersebut adalah ...

Nonpoint source pollution is difficult to control because it

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.

How many liters of ethylene glycol antifreeze (c2h6o2), with a density of 1.100 g/l, would you add to your car radiator containing 15.0 kg of water if you needed to protect your engine to - 21.5°c? for water, kf = 1.86°c m -1.