Un gas absorbe 54,8 calorías de calor y se comprime a una presión externa constante de 2,5 atm desde 15 a 8 litros de volumen. ¿Cuál es su energía interna en julios?

Answer asap need by wednesday morning calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 best answer will be brainliest

How many neutrons does an element have if its atomic number is 50 and its mass number is 166

How is it possible for someone to put an ear to a wall and hear someone in the next room?     a.sound waves can travel though solids.    b.the waves travel from room to room via air.    c.there must be some air in the wall so the sound can travel through it.    d.sound waves change to electromagnetic waves and then back again.