Calculations quiz Loading... 1. What is meant by the term empirical formula?A method of calculating the ratios of masses in an equationA chemical formula that shows the simplest ratio of the numbers of atoms in a compoundBaby food for emperorsA chemical formula that shows the actual numbers of the different types of atoms in a moleculeQuestion 1 of 9 Loading... 2. Work out the empirical formula of an oxide of chlorine contains 7.1 g of chlorine and 1.6 g of oxygen. Cl₄OCl₄O₂Cl₂OCl₂O₂Question 2 of 9 Loading... 3. A sample of carbon contained 98.90% carbon-12 and 1.10% carbon-13. Calculate the relative atomic mass of carbon((12x98.90)+(13x1.10))/100 = 12.01((13x98.90)+(12x1.10))/100 = 12.99(12x13)/100 = 1.56(12+13)/2 = 12.5Question 3 of 9 Loading... 4. State the mass and charge of a neutronNeutron: mass=1, charge =0Neutron: mass=1, charge =-1Neutron: mass=1, charge =+1Neutron: mass=negligible, charge =-1Question 4 of 9 Loading... 5. An oxide of nitrogen contains 26% nitrogen and 74% oxygen and has a relative molecular mass of 108. Find the empirical and molecular formulae for the oxide.Empirical formula is N₂O₅. Molecular formula is N₄O₁₀Empirical formula is NO₂.₅ Molecular formula is N₂O₅Empirical formula is N₄O₁₀. Molecular formula is N₂O₅Empirical formula is N₂O₅. Molecular formula is also N₂O₅Question 5 of 9 Loading... 6. To determine the formula of a metal oxide by combustion, magnesium is heated in a crucible. Why is a lid lifted from time to time?To stop the crucible heating up too muchTo allow carbon dioxide to escapeTo allow some magnesium oxide smoke to escapeTo allow oxygen in so the magnesium fully reactsQuestion 6 of 9 Loading... 7. Calculate the relative formula mass(Mr) of calcium hydroxide (Ca(OH)₂)74385873Question 7 of 9 Loading... 8. How many neutrons in a typical atom of sulfur?1683214Question 8 of 9 Loading... 9. How many electrons can the first, second and third shells hold?First 2, second 8, third 8First 8, second 8, third 8First 2, second 6, third 6First 0, second 8, third 8Question 9 of 9 Loading... Related Posts:The entire quiz question bank!The entire quiz question bank (Double only)!Key Calculations quizEquilibria (triple) quizCondensation Polymers quizElectrolysis quiz Hydr0Gen2020-02-16T16:38:53+00:00Categories: Uncategorized|Tags: Quiz, Topic: Calculations| Share This Story, Choose Your Platform! FacebookXRedditLinkedInTumblrPinterestVkEmail