Calculations quiz Loading... 1. What is meant by the term molecular formula?A chemical formula that shows the actual numbers of the different types of atoms in a moleculeA method of calculating the ratios of masses in an equationA method of calculating the mass needed to make a certain yield in an equationA chemical formula that shows the simplest ratio of the numbers of atoms in a compoundQuestion 1 of 9 Loading... 2. A sample of carbon contained 98.90% carbon-12 and 1.10% carbon-13. Calculate the relative atomic mass of carbon(12+13)/2 = 12.5(12x13)/100 = 1.56((12x98.90)+(13x1.10))/100 = 12.01((13x98.90)+(12x1.10))/100 = 12.99Question 2 of 9 Loading... 3. Work out the empirical formula of an oxide of chlorine contains 7.1 g of chlorine and 1.6 g of oxygen. Cl₂OCl₂O₂Cl₄O₂Cl₄OQuestion 3 of 9 Loading... 4. How many electrons can the third shell hold?328162Question 4 of 9 Loading... 5. Calculate the relative formula mass(Mr) of aluminium oxide (Al₂O₃)1298643102Question 5 of 9 Loading... 6. To determine the formula of a metal oxide by combustion, magnesium is heated in a crucible. Why is the crucible is cooled, weighed, reheated, cooled, re-weighed, and so on?To make sure the mass is still going down so the magnesium is still reactingTo ensure all the magnesium oxide to escapeTo make sure a constant mass has been reached and there is no more magnesium left to reactTo allow any water to escapeQuestion 6 of 9 Loading... 7. What are the two parts of an atom?The outside and insideThe nucleus and the electron cloudThe centre and the electron shellsThe nucleus and the electron shellsQuestion 7 of 9 Loading... 8. What is the atomic number of a chlorine atom?171935.518Question 8 of 9 Loading... 9. 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 N₄O₁₀. Molecular formula is N₂O₅Empirical formula is N₂O₅. Molecular formula is also N₂O₅Empirical formula is N₂O₅. Molecular formula is N₄O₁₀Empirical formula is NO₂.₅ Molecular formula is N₂O₅Question 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