Advertisements
Advertisements
Question
Calculate the % of each element in calcium carbonate. (Atomic mass: C-12, O-16, Ca -40)
Advertisements
Solution
Calcium carbonate: CaCO3
Molar mass of CaCO3 = 40 + 12 + (16 × 3) = 100 g
% of Calcium = `40/100×100` = 40%
% of Carbon = `12/100×100` = 12%
% of Oxygen = `48/100×100` = 48%.
APPEARS IN
RELATED QUESTIONS
Define atomic mass of an element.
What is meant by saying that 'the atomic mass of oxygen is 16' ?
What is meant by atomic mass number?
Name or state the following:
Atoms of the same element differing in mass number
Give a reason for the following:
The mass number of an atom is slightly less than the actual atomic mass.
Which of the following has the smallest mass?
Mass of 1 mole of Nitrogen atom is ______
Write the different types of isotopes of oxygen and their percentage abundance.
Calculate the % of oxygen in Al2(SO4)3. (Atomic mass: Al-27, O-16, S -32)
Chlorine exists in two isotopic forms, \[\ce{Cl-37}\] and \[\ce{Cl-35}\] but its atomic mass is 35.5. This indicates the ratio of \[\ce{Cl-37}\] and \[\ce{Cl-35}\] is approximately
