The density equals to the mass divided by volume. The equation of calculation is density= 15/3=5.0 g/ml. Notice the unit and the significant figures.
Lar mass of Ca<span> = 40.08 </span>grams/mole 77.4 g Ca<span> * ( 1 </span>mole Ca<span>/ 40.08 ... n = m / M 1mol </span>Ca<span>weights 40 gmol-1 n = 77,4 / 40 = 1.93 </span>mol<span>.</span>
Methyle orange is the indicator that is used in sulfuric acid.
