Approximately how long will it be before they are cool enough to eat at 160 degrees f?

you take a pan of brownies out of the oven and set them on the counter in a room that is 70 degrees f, if the brownies start at 400 degrees f, approximately how long will it be before they are cool enough to eat at 160 degrees f? use newton's law of cooling with k = 0.035.

approximately how long will it be before they are cool enough to eat at 160 degrees f?

oh it is true if thats what you are asking

gold is my favorite solid.

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