chap 4 chemical calculations

• chemical formula of carbon monoxide

  CO
• chemical formula of nitrogen monoxide

  NO
• chemical formula of carbon dioxide

  CO2
• chemical formula of nitrogen dioxide

  NO2
• chemical formula of sulfur dioxide

  SO2
• chemical formula of ammonia

  NH3
• chemical formula of methane

  CH4
• chemical formula of hydrochloric acid

  HCl
• chemical formula of nitric acid

  HNO3
• chemical formula of sulfuric acid

  H2SO4
• chemical formula of phosphoric acid

  H3PO4
• chemical formula of ethanoic acid

  CH3COOH
• chemical formula of ammonium ion

  NH4+
• chemical formula of silver

  Ag+
• chemical formula of zinc

  Zn2+
• chemical formula of hydroxide

  OH-
• chemical formula of nitrate

  NO3-
• chemical formula of sulfate

  SO4 2-
• chemical formula of carbonate

  CO3 2-
• chemical formula of phosphate

  PO4 3-
• relative atomic mass


  the average mass of one atom of an element compare to 1/12 of mass of one carbon-12 atom
• relative molecular mass


  the average mass of one molecule compared to 1/12 of mass of one carbon-12 atom
• mole= no. of particles/ 6 x 10^23
• mole= mass/ molar mass
• mole= vol/ 24dm^3
• mol/ mass= conc. x vol
• one mole of any substance will always contain 6.02 x 10^23 particles of that substance
• n of (empirical formula)n = Mr of compound/ Mr of empirical formula
• percentage yield = actual yield/ theoretical max yield x 100%
• percentage purity = mass of pure substance present in sample / total mass of impure sample x 100%