The image compares the arrangement of electrons in two different neutral atoms. Atom P
Atom Q
Which of the following best explains the position of the two atoms in the periodic table? (4 points)
O a
Atom P has an estimated Zell of 7 and is therefore to the left of Atom Q, which has a Zer of 6.
Ob
Atom P has an estimated Zelf of 7 and is therefore to the right of Atom Q, which has a Zerr of 6.
Ос
Atom P has an estimated Zelf of 5 and is therefore below Atom Q, which has a Zert of 4.
Od
Atom P has an estimated Zelf of 5 and is therefore above Atom Q, which has a Zer of 4.

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

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

: )