Formula & Percent quiz
Quiz by Michael Ufkin
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12 questions
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- Q1What is the formula mass of Copper(II) Chloride, CuCl₂?35.45g/mol99g/mol63.55g/mol134.45g/mol30s
- Q2What is the percentage composition of CuCl₂ by mass?63.55% Cu 35.45% Cl47.26% Cu 52.74% Cl64.19% Cu 35.81% Cl30s
- Q3Determine the mass of 0.240 mol of Glucose C₆H₁₂O₆180.16 grams.240 grams43.24 grams24 grams30s
- Q4A sample of a compound contains 259.2 grams of F and 40.8 grams of C. Find the empirical formula.C₂F₂C₄F₄CFCF₄30s
- Q5The empirical formula of a compound is C₂H₅ and it's formula mass is 58amu. What is the molecular formula?CH₃C₆H₁₅C₄H₁₀C₂H₅30s
- Q6A sample of a compound is 80% carbon and 20% hydrogen by mass. Its formula mass is 30 amu. What is the molecular formula?C₂H₆CH₂C₂H₄CH₃30s
- Q7To determine the correct molecular formula from an empirical formula, one must determine the __________ of the compoundformula massdensitycrystal latticestructure30s
- Q8An empirical compound and a molecular compound...Can never be the sameCould be the same30s
- Q9A gas is found to be 24% carbon and 76% flourine by mass. Determine the empirical formula.CF₃CFCF₂CF₄30s
- Q10If the molar mass of the gas in the above question is 200.04 g/mole, determine its molecular formulaC₄F₈C₂F₈C₂F₆C₂F₂30s
- Q11What is the mass in grams of .25 mol of sodium hydroxide (NaOH)?.25 grams25 grams40 grams10 grams30s
- Q12Ribose is an important sugar with a molar mass of 150.15 g/mol. If it's empirical formula is CH₂O, what is its molecular formula?C₂H₄O₂CH₂OC₅H₁₀O₅C₃H₆O₃30s