Empirical formula calculations
Quiz by Oak National Academy: GCSE Chemistry Edexcel Foundation
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6 questions
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- Q1Which of the following best describes the term "empirical formula"?The formula that describes the types of chemical bonds in a compound.The formula used exclusively in organic chemistry.The simplest whole number ratio of atoms of each element in a compound.The formula that shows the total number of atoms in a molecule.30s
- Q2Write the empirical 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?NH₂N₂H₄NH₃N₂H₆30s
- 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 120g of carbon reacts with 10g of hydrogen to form a compound, calculate the simplest ratio of carbon:hydrogen in the compound. Use the relative atomic masses (Ar): carbon = 12, hydrogen = 1.1:11:44:14:430s
- Q6A compound is 85.7% carbon and 14.3% hydrogen by mass. Calculate its empirical formula. Use the relative atomic masses (Ar): carbon = 12, hydrogen = 1.CH₂C₃H₄C₂H₃CH30s