Answer: H
H- C- H
H
Explanation:
Lewis structures are the structures which represent the valence electrons of the element around the chemical symbol of the element.
Carbon is an element which belong to group 14. Atomic number of carbon is 6 that means it contains 6 electrons, Thus the electronic configuration is represented as: 
. Thus the valence electrons are 4.
Hydrogen is an element which belong to group 1. Atomic number of hydrogen is 1 that means it contains 1 electron, Thus the electronic configuration is represented as: 
. Thus the valence electron are 1.
The four valence electrons of carbon are shared with one valence electron of hydrogen each.
Answer:
14 mol
Explanation:
CH4(g) + 2O2(g) -------» CO2(g) + 2H2O(g)
from reaction 1 mol 2 mol
given 7 mol x mol
x = (7*2)/1 = 14 mol
It is approximately 0. It could be barley higher or lower for both. You have to take the altitude into consideration.
if we did not use an excess of the BaCl2 solution it would decrease the mass percentage of sulfate in the unknown sample.
The net precipitation equation would be.
Ba2+(aq) + SO42-(aq) → BaSO4(s)
If BaCl2 (Ba2+) is not taken in excess then the precipitation would not be completed as some of the sulfate ions would still be remaining in the solution. This would decrease the mass percentage of sulfate in the unknown sample.
If some tiny pieces of filter paper still remained mixed with the precipitate(BaSO4) then the mass of sulfate would increase and it gives a high mass percentage of the sulfate.
mass percentage of sulfate = (mass of sulfate/mass of sample)*100
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Answer:
MnO3 radical anion. Formula: MnO3- Molecular weight: 102.9368.
