Để điều chế khí SO2 trong phòng thí nghiệm người ta cho Na2SO3 tác dụng với HCl. Hỏi phải dùng tối thiểu bao nhiêu gam dung dịch HCl 14.6% để điều chế được 2.24 lít khí SO2

no starving yourself won't it will make you lose more weight what you need to do is find out what foods make you gain weight like bread and meats with fat on

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.