Answer: 2.8 moles of copper (Il) sulfide 
will be produced from 2.8 moles of sulphur.
Explanation:
The balanced chemical reaction is:
According to stoichiometry :
1 mole of 
produce = 1 mole of copper (Il) sulfide
Thus 2.8 moles of will produce=
of copper (Il) sulfide
Thus 2.8 moles of copper (Il) sulfide will be produced from 2.8 moles of sulphur.
Answer:
The air that we breathe in enters the nose or mouth, flows through the throat (pharynx) and voice box (larynx) and enters the windpipe (trachea). The trachea divides into two hollow tubes called bronchi
Explanation:
Soil.
Heterogeneous means is can be separated and soil can be taken apart and separated according to its contents. (Rocks, dirt, grass). <span />
The 2 in front of 
in 
is <u>Coefficient.</u>
_____________________________
The 
after 
in the same equation is <u>sub </u><u>script</u><u>.</u>
_____________________________
There are two atoms of in 
_____________________________
Atomic number refers to the proton number of the atom itself. Number of electrons in an atom (an atom that is not reacted with any other molecules / Just the atom alone), is the same as the number of protons, because each electron has 1 negative charge, and each proton 1 positive charge, where they cancel out on each other to become a neutral charge.
So, when atomic number is 6, proton number is also 6, and number of electrons will also be 6 in that atom.
Hope this helps! :)
