Plz help ASAP this is due today. 1) What is the approximate volume of 280 g of chlorine gas (Cl2) at STP?

A) 7.9 L
B) 22 L
C) 88 L
D) 180 L

2) 1 molecule of hydrogen+ 1 molecule of chlorine = 2 molecules of hydrogen chloride.
A) 2H+2CI=H2CI2
B) 2H+2CI=2HCI
C) H2+CI2=H2CI2
D) H2+CI2=2HCI

no

Explanation:

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.