If 1 mole of helium is 4.002602 then 1.2 mole is about ~ 4.803 ♂️.
The maximum percent of yield should be 100%, so It wasn't possible to make a higher than 100% yield like 105% in this problem. If that happens, it will contradict the law of conservation of energy as you can't create mass.
The increased mass might be produced by impurities. One of the examples would be if you rinse the container and left some water. The water is not calculated as a substrate but will increase the results weight.
There also possibilities that some gas in the air react and produce a solid/liquid material. If you don't weight the gas it would seem that the mass increased.
Answer:
3p⁶ 4s² 3d²
Explanation:
From the question given above,
The electronic configuration of the element ends with 3p².
Another element having 8 more electrons will have the following electronic configuration as illustrated below:
Step 1:
Complete the 3p orbital by adding 4 electrons:
3p² + 4 electrons = 3p⁶
Step 2:
Fill the 4s orbital. This is so because 4s has a lower energy level compared to 3d.
4s²
Step 3:
Fill the 3d orbital with the remaining electrons i.e 2
3d²
Summary:
The continuation of the electronic configuration of the element with 8 more electrons is:
3p⁶ 4s² 3d²
Since it is specifically stated that the hydrogen is an
atom and not an ion, therefore it is written simple as H (not H+). So since an
atom of Hydrogen (H) has one proton and one electron and it loses its electron,
therefore it is left with one proton, therefore now it becomes an ion of H+.
So answer is its charge is +1.
Answer:
<span>D. +1</span>
balanced: there is one person on the bike with both feet on both pedals going at a steady pace
unbalanced: there is one person on the bike with both feet to one side of the bike swaying from side to side
balanced: there are two people on the bike with both feet on both sides and theyre both moving the same way
unbalanced: there are two people on the bike with their feet to one side and theyre not moving in the same way together