Calculations quiz Loading... 1. A sample of carbon contained 98.90% carbon-12 and 1.10% carbon-13. Calculate the relative atomic mass of carbon(12x13)/100 = 1.56((13x98.90)+(12x1.10))/100 = 12.99(12+13)/2 = 12.5((12x98.90)+(13x1.10))/100 = 12.01Question 1 of 9 Loading... 2. How many electrons in the outer shell of group 5 elements?5468Question 2 of 9 Loading... 3. Which particle(s) in an atom has a negative charge?NeutronElectronProtonElectrons and neutronsQuestion 3 of 9 Loading... 4. 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 4 of 9 Loading... 5. State the steps for calculating empirical formula1) Aᵣ/mass. 2) divide by the largest. 3) Give the ratio has a whole number. 4) State final empirial formula1) mass/Aᵣ. 2) divide by the largest. 3) Give the ratio has a whole number. 4) State final empirial formula1) mass/Ar. 2) divide by the smallest. 3) Give the ratio has a whole number. 4) State final empirial formula1) Aᵣ/mass. 2) divide by the smallest. 3) Give the ratio has a whole number. 4) State final empirial formulaQuestion 5 of 9 Loading... 6. What is the atomic number of a chlorine atom?35.5171918Question 6 of 9 Loading... 7. 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 allow oxygen in so the magnesium fully reactsTo allow some magnesium oxide smoke to escapeTo allow carbon dioxide to escapeTo stop the crucible heating up too muchQuestion 7 of 9 Loading... 8. 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 N₄O₁₀. Molecular formula is N₂O₅Empirical formula is NO₂.₅ Molecular formula is N₂O₅Empirical formula is N₂O₅. Molecular formula is also N₂O₅Question 8 of 9 Loading... 9. Calculate the relative formula mass(Mr) of hydrated copper (II) sulfate (CuSO₄.5H₂O)180.5177.5249.5127Question 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