When is it fair to compare the results of two experiments?
n is it fair to compare the results of two experiments?
A.
when the conditions of the experiments are the same
B.
when the same person does both experiments
C.
when the conditions of the experiments are different
D.
when the results of the experiment are surprising

A. When the conditions of the experiments are the same

Explanation:

In order to fairly compare the results of experiments, conditions must remain the same. The only thing that you should change is the independent variable

did anyone actually do this? like if anyone has submitted this i rly need .

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