If you’re talking about noble gases, the answer would be A. Since noble gases already have 8 electrons, they don’t tend to form chemical bonds. And elements need just 8 electrons on there shells to be stable.
Answer:
Explanation:
Density is
mass / volume = d
Mass:
840g
Volume:
7 cm x 4 cm x 10 cm = 280 cm^3
840g / 280 cm^3 = 3 g/cm^3
Mass for carbon = 12
Mass for hydrogen = 1
Mass for oxygen = 16
Mass for nitrogen = 14
12+1+14+16 = 33
165g / 33g = 5
times all the atoms by 5
C5H5O5N5
Answer:
The rate of the forward reaction is equal to the rate of the reverse reaction
Explanation:
Equilibrium is a condition in which the net force for change is zero.
In chemistry, equilibrium exists when reactant concentrations in a reaction are not changing. This condition means the reaction proceeding left to right in the reaction equation is producing products at the same rate those products are being used up by the reaction proceeding right to left. In short, the rate of the forward reaction is equal to the rate of the reverse reaction.
A physical change changes the form of the matter, but does not change the substance itself.
A chemical change affects the substance and turns into a different substance.
Ex:
Physical change: Water freezes- its changes form, but it is still water
Chemical change: Wood burns- it is changing its makeup from wood to ash and various gases. You cant identify it as wood anymore.
