Empirical formula calculations: using moles
Quiz by Oak National Academy: GCSE Chemistry Edexcel Higher
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6 questions
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- Q1Which of the following best describes the term 'empirical formula'?The simplest whole number ratio of atoms of each element in a compound.The formula used exclusively in organic chemistry.The formula that shows the total number of atoms in a molecule.The formula that describes the types of chemical bonds in a compound.30s
- Q2Write the empirical formula and molecular formula for a compound with a molecular formula of C₆H₁₂O₆.Users enter free textType an Answer30s
- Q3The empirical formula of a compound is NH₃ and its relative formula mass (Mr) is 34. What is its molecular formula?N₂H₆NH₂NH₃N₂H₄30s
- Q4True or false? Empirical formula shows the simplest ratio of how many atoms there are of each element in a substance; molecular formula shows the exact numbers of atoms of each element.truefalseTrue or False30s
- Q5Given the following information, calculate the empirical formula of a compound: 2.4 moles of magnesium and 4.8 moles of oxygen.Mg₂OMgOMgO₂Mg₂O₄30s
- Q6Given 40 g of carbon reacts with 10 g of hydrogen to form a compound, calculate the empirical formula of the compound. Use the relative atomic masses (Ar): Carbon = 12, Hydrogen = 1.CHCH₄C₄H₄C₄H30s