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).

1.milk of magnesia, a suspension of mg(oh)2in water, reacts with stomach acid (hcl) in a neutralization reaction. mg(oh)2(s) + 2 hcl(aq) −→ 2 h2o(l) + mgcl2(aq) what mass of mgcl2 will be produced if 5.49 g of mg(oh)2 reacts? answer in units of g. 2.what mass of hcl is required to completely react with 5.49 g of mg(oh)2? answer in units of g.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

Chemistry worksheet - i am not sure what they are asking for exactly?