Aliquid mixture containing 40.0 wt% n-octane and the balance n-decane flows into a tank mounted on a balance. the mass in kg indicated by the scale is plotted against time. the data fall on a kg) and = 10 min; m 250 kg) straight line that passes through the points (t 3 min; m 150 |(q5.1a) estimate the volumetric flow rate (l/min) of the liquid mixture. in the pixar film, up, carl fredrickson turns his house into a makeshift airship using helium balloons. (q5.17a) neglecting the force required to remove the house from its foundation, how many spherical balloons, each having a 9.5- inch diameter and an interior gas pressure of 1.05 atm, would carl have to tie to his house for it to float? assume that the house weighs 1.00x105 lbf , and that atmospheric pressure and temperature are 1.0 atm and 25 c

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2

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.