Dimensional Analysis QuizVersion en ligne Test your knowledge on dimensional analysis and conversion factors! par Ali Zia 1 What is dimensional analysis primarily used for? a Calculating averages. b Finding percentages. c Problem solving using conversion factors. d Measuring distances. 2 What is a conversion factor? a A type of measurement. b A formula for averages. c A method of addition. d A ratio of equivalent values with different units. 3 How do you convert 300 m to km? a 300 m x 10 km/m = 3000 km. b 300 m x 1000 km/m = 300000 km. c 300 m x 1 km/100 m = 3 km. d 300 m x 1 km/1000 m = 0.3 km. 4 What is the conversion factor for moles to liters for ideal gases at STP? a 1 mole = 20.0 L. b 1 mole = 18.0 L. c 1 mole = 24.5 L. d 1 mole = 22.4 L. 5 How many moles are in 44.8 L of an ideal gas at STP? a 3 moles. b 4 moles. c 2 moles. d 1 mole. 6 When using a conversion factor, where is the desired unit placed? a In the denominator. b It doesn't matter. c At the end of the equation. d In the numerator. 7 What does STP stand for in chemistry? a Standard Temperature and Proportion. b Standard Time and Pressure. c Standard Temperature and Pressure. d Standard Tension and Pressure. 8 Which of the following best describes accuracy? a How close measurements are to one another b How close a measured value is to the true value c The range of uncertainty in a measurement d The number of significant figures in a measurement 9 A thermometer reads 37.0°C with an uncertainty of ±0.3°C. What is the possible range of the actual temperature? a 36.5°C to 37.5°C b 36.7°C to 37.3°C c 37.0°C to 37.3°C d 36.8°C to 37.2°C 10 How many significant figures are there in the measurement 0.004560? a 2 b 4 c 3 d 5 11 What is the error if the measured mass of an object is 49.8g, and the true mass is 50g? a -0.2g b 0.2g c 0.4g d 50.2g 12 Which of the following picture indicates both precise and accurate arrows? a A b B c C d D
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