It's known as chromium (III) sulphate which is green in colour.
Answer:
Percentage by mass of calcium carbonate in the sample is 93.58%.
Explanation:
Assumptions:
- calcium carbonate was dissolved completely and the amount of carbon dioxide released was proportional to the amount of calcium carbonate.
- the sample did not contain any other compound that released or reacted with carbon dioxide.
given the equation of the reaction:
from assumption:
amount carbon dioxide = amount of calcium carbonate
reacting mass ( m ) = Molar Mass ( M ) * Amount ( n )
m = 0.04938397 * 100 = 4.93839
percentage by mass of CaC = .
Explanation:
the solid substance which left on the filter paper is called Residue
Luminosity represent the star's lifetime because it shows how bright they are. does that help?