A sample of oxygen gas occupies a volume of 0.4652 L. When the volume is increased to 0.5782 L, the new pressure is 341.3 atm. What was the original pressure?

10 years is the answer

the answer is barium and copper bromide

there are two significant figures.

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.