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Chemical formulae, equations and calculations

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Question 69

Modern consumer aerosol products and electronic dusters often use hydrofluorocarbons (HFCs) as propellants because they do not deplete the stratospheric ozone layer. One commonly used gaseous HFC propellant has the following composition by mass:

  • Carbon: 36.4%36.4\%36.4%
  • Hydrogen: 6.1%6.1\%6.1%
  • Fluorine: 57.5%57.5\%57.5%
a.

Calculate the empirical formula of this compound. [Relative atomic masses: C=12\text{C} = 12C=12, H=1\text{H} = 1H=1, F=19\text{F} = 19F=19]

[3]
b.

The relative formula mass (MrM_rMr​) of this compound is 66. State its molecular formula.

[2]

Chemical formulae, equations and calculations Questions

  1. IGCSE
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  3. /Chemical formulae, equations and calculations