Trong dung môi là nước, aniline hấp thu bước sóng 280nm với ε = 1430 l. mol-1.cm-1. Nếu muốn pha chế
100mL dung dịch aniline có độ truyền suốt 30% đối
với bức xạ trên thì phải cân bao nhiêu gam aniline
(C6H5NH2
) nguyên chất, (dùng cuvet đo có l = 1cm).

Describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? )

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?