Organisms are classified as living things, rather than nonliving things, based on specific characteristics. one of those characteristics is the ability to grow and change. which of these is the best example of a living thing showing this characteristic?
a) a mother lion nurses her cubs in the safety of a den.
b) a bear's heart rate lowers to conserve energy during winter.
c) a pupa forms around a caterpillar as it morphs into a butterfly.
d) a squirrel collects and stores acorns and nuts in a tree for winter.

C

Explanation:

The definition was GROW & CHANGE. This is the only answer that shows growing & changing.

The answer would probably be C as it says “one of those characteristics is the ability to grow and change” which C says “ pupa forms around a caterpillar as it morphs into a butterfly” and it is stating the change that happens between a pupa, caterpillar, and butterfly

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

the answer is 1 i believe