Explain why the number you calculated for avogadro’s number may match the actual number of 6.02 x 1023 – be sure to provide a detailed explanation.

Explanation:

In sciences like physics or chemistry exist constants, like Avogadro's number or the Gravitational constant. This means that those magnitudes are always the same no matter the environment, like light's velocity for example. This magnitudes can be used as constants because only could change in extreme environments.

So, as a constant, Avogadro's number is present in every mole, because indicate the number of molecules in one mole, no matter which element it is.

first, consult an activity series chart to determine if al is more reactive than fe. it is, so it will replace the fe. now, one can continue with the problem.

next, make sure you have a correctly balanced equation.

3feo + 2al ==> 3fe + al2o3

now, determine which reactant (feo or al) is in limiting supply.

moles feo present = 125 g x 1 mole/71.8 g = 1.74 moles

moles al present = 25.0 g x 1 mole/26.98 g = 0.927 moles

since from the balanced equation, it take 3 mol feo for every 2 mol al, al will be limiting.

you can determine this simply by dividing moles of each by their coefficient in the balanced equation. for example: 1.74/3 = 0.58 and 0.927/2 = 0.464. al is less, so it is limiting.

finally, using the stoichiometry in the balanced eq. determine mass of fe that can be produced from 0.927 moles of al.

0.927 moles al x 3 moles fe/2 moles al x 55.8 g/mole = 77.6 g

може ли да зареждате повече информация, моля