Chemistry
Calculate the percentage composition of
(a) calcium chloride
(b) calcium nitrate
[Ca = 40 , Cl = 35.5 , N = 14 , O = 16]
Related Questions
Define the terms – (a) Relative atomic mass (b) Relative molecular mass. State why indirect methods are utilized to determine the absolute mass of an atom. Explain in brief the indirect method used.
Calculate relative molecular mass of
(a) ZnCO3
(b) CaSO4[Zn = 65, S = 32, O = 16, Ca = 40, C = 12]
Match the names of ions and radicals from 1 to 10 with their correct answer from A to Q.
A: Hg2+ B: MnO41- C: Sn4+ D: Pb2+ E: Sn2+ F: Pb4+ G: SO32- H: N3- I: NO21- J: MnO42- K: Hg1+ L: SO42- M: ClO1- N: ZnO22- O: Cr2O72- P: CrO42- Q: ClO31- 1. Hypochlorite 2. Permanganate 3. Plumbous 4. Zincate 5. Nitride 6. Mercuric 7. Stannic 8. Nitrite 9. Sulphite 10. Dichromate State which of the following formulas of compounds A to J are incorrect. If incorrect write the correct formula.
A: (NH4)3SO4 B: NaZnO2 C: KCr2O7 D: NaCO3 E: Ca2(PO4)3 F: Mg(SO4)2 G: KNO3 H: NaClO I: NaO J: BaCl2