Athermostat control with dial markings from 0 to 200 is used to regulate the temperature of an oil bath a calibration plot on logarithmic coordinates of the temperature (of) versus the dial setting r is a straight line that passes through the points (r1= 5.00, t1 = 110.0 °f) and (r2=45.0, t2=250.0 °f) a. in the equation t(of) = arb, what are the values of a and b? a = of b = b. estimate the thermostat setting need to obtain a temperature of 320.0°f r = c. estimate the thermostat setting needed to obtain a temperature of 120.0°c r

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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