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Metric Conversions and Density Calculations in General Chemistry Exam Review

Review metric conversions from grams to milligrams, centimeters to meters, and kilograms to grams. Explore density calculations for various objects with given masses and volumes. Practice converting between moles, grams, and atoms. Understand electron configurations for elements.

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Metric Conversions and Density Calculations in General Chemistry Exam Review

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  1. Final Exam Review Session 1 General Chemistry Mr. Mata

  2. Metric Conversions 672 g x ________ mg (1000 mg = 1 g) g 672 g x 1000 mg = 672,000 mg 1 g

  3. Metric Conversions 4850 cm x ________ m (1 m = 100 cm) cm 4850 cm x 1 m = 48.5 m 100 cm

  4. Metric Conversions 27.7 kg x ________ g (1000 g = 1 kg) kg 27.7 kg x 1000 g = 27,700 g 1 kg

  5. Metric Conversions 18.6 mL x ________ L (1 L = 1000 mL) mL 18.6 mL x 1 L = 0.0186 L 1000 mL

  6. Density Calculations (Density = mass/volume) What is the density of a 22 gram piece of metal with a volume of 650 cm3? Density = 22 gram = 0.034 gram/cm3 650 cm3

  7. Density Calculations (Density = mass/volume) Find the density of a cube with a length of 7 cm and a mass of 522 grams. (volume = length x width x height) Volume = 7 cm x 7 cm x 7 cm = 343 cm3 Density = 522 grams = 1.52 gram/cm3 343 cm3

  8. Density Calculations (Density = mass/volume) Calculate the density of an object with a volume of 16 mL and a mass of 48 grams. Density = 48 grams = 3.0 gram/mL 16 mL

  9. Grams -> moles How many moles are there in 120 grams NaOH? 120 grams NaOH x 1 mol NaOH = 3.0 mol NaOH 40 g NaOH Molar mass NaOH = 23 + 16 + 1 = 40 grams

  10. Moles -> grams How many grams are there in 18.7 moles NaNO3? 18.7 mol NaNO3 x 85 g NaNO3 = 1589.5 g NaNO3 1 mol NaNO3 Molar mass NaNO3 = 23 + 14 + 48 = 85 grams

  11. Moles -> atoms How many atoms are in 178 moles of Ca(NO3)2? (Hint: 1 mole = 6.02 x 1023 atoms) 178 mol Ca(NO3)2 x 6.02 x 1023 atoms Ca(NO3)2 = 1 mol Ca(NO3)2 = 1.1 x 10 26 atoms Ca(NO3)2

  12. Electron Configuration F 9 F 9 = 1s22s22p5

  13. Electron Configuration Cl 17 Cl 17 = 1s22s22p63s23p5

  14. Electron Configuration Fe 26 Fe 26 = 1s22s22p63s23p64s23d6

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