D . Water evaporating in the water cycle is an open system
<u>The </u><u>emperical formula </u><u>can be </u><u>calculated </u><u>as follows:</u>
<u>mass :</u> 4.12g of N and 0.88g of H
<u>moles:</u> 4.12g/14.007 and 0.88g/1.008
<u>moles:</u> 0.294 and 0.873
<u>moles/smallest number</u>: (gives the ratio of atoms)
0.294/0.294 and 0.873/0.294
1 and 2.969
1 and 3
The simplest ratio of N : H is 1 : 3
<u>Hence the </u><u>emperical formula </u><u>is </u><u>NH3</u>
<u>Explanation:</u>
1. The emperical formula can be found by getting the <u>simplest ratio of atoms in a molecule.</u>
2. To get the simplest ratio of atoms we find out the <u>number of moles of each atoms in it.</u>
3. From the number of moles of atoms we can find the simplest ratio of each atom by dividing the <u>number of moles by the smallest number.</u>
Answer:
The second law of thermodynamics.
Explanation:
The global transfer of energy from fuels to electricity is about 35% efficient is most likely a consequence of the second law of thermodynamics. This second law states that as energy is transformed more it is wasted, also that the entropy of a system remains constant or increase, but never decrease over time. That is why is impossible to convert heat energy to mechanical with 100 % efficiency.
Therefore, in the production of electricity, a minor part of chemical energy (from fuels) will be transformed into energy and the rest will be lost to the environment, mostly as heat, to satisfy the second law of thermodynamics.
I hope it helps you!
Just as cells join together to form tissues, different tissues join together to form organs. hope this helps :P
