<span>A dim white dwarf star, this is a star with a similar mass to earth. This star has no further fusion reactions at it's core. After this type of star has used up all of it's energy it will become a black dwarf star. Usually they are composed of oxygen and carbon. Sirius a and b are both white dwarf stars that orbit each other.</span>
Okay so molar mass is given, no. of moles is given and we have to calculate the weight or mass of the compound in gram.
the formula we will use here is= n=W/M
where n is no. of moles ,w is weight in gram which we have to find and M is molar mass or formula weight which is given.
so W=n x M
use this formula you'll get the answer
Actually the total abundance of the isotopes of any
element in this world must sum up to 100%. So we initially know that 12 C is
98.9 percent abundant, therefore the remaining of the 100 percent must be of 13
C, that is:
13 C = 100% - 98.9%
<span>13 C = 1.1% </span>
Answer:
carbon is a -4 anion
Explanation:
It needs 4 electrons from other molecule(s)/element(s) to be stable.
In collecting the precipitate, it is inappropriate to heat <span>the reacted mixture and evaporate off the water because it is possible that the mixture contains other substances that precipitates as well when the mixture is being heated so you will not be able to collect what you want.</span>
