Question

Calculate percentage composition of –
a) Nitrogen and Carbon in urea
b) Calcium in Calcium bicarbonate
c) Oxygen in Na2CO3.10H2O
3. Give empirical formula of –
a) C5H10O5
b)C12H22O11
c)C4H10
d)C6H12
e)CH4
f)C3H7O6

Answer 1

Answer:

• Urea Is Both a Carbon and Nitrogen Source for Microcystis aeruginosa: Tracking 13C Incorporation at Bloom pH Conditions. The use of urea as a nitrogenous fertilizer has increased over the past two decades, with urea itself being readily detected at high concentrations in many lakes.

• Here is your answer! 1 mole of Na2CO3. 10H2O contains 13 mole oxygen.
• Calcium bicarbonate, also called calcium hydrogen carbonate, has a chemical formula Ca(HCO₃)₂. The term does not refer to a known solid compound; it exists only in aqueous solution containing the calcium, bicarbonate, and carbonate ions, together with dissolved carbon dioxide.