Practice Final Exam.

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Presentation transcript:

Practice Final Exam

Metric Conversions 500 g x ________ mg (1000 mg = 1 g) g

Metric Conversions 400 cm x ________ m (1 m = 100 cm) cm

Density Calculations (Density = mass/volume) What is the density of a 60 gram piece of metal with a volume of 1500 cm3? Density = 60 gram = 0.04 g/cm3 1500 cm3

Density Calculations (Density = mass/volume) Find the density of a cube with a length of 2 cm and a mass of 120 grams. (volume = length x width x height) Volume = 2 cm x 2 cm x 2 cm = 8 cm3 Density = 120 grams = 15 g/cm3 343 cm3

Grams -> moles How many moles are there in 200 grams H3PO4? 200 g H3PO4 x 1 mol H3PO4 = 2.0 mol H3PO4 98 g H3PO4 Molar mass H3PO4 = 1(3) + 31 + 16(4) = 98 grams

Moles -> grams How many grams are there in 80 moles H2SO4? 80 mol H2SO4 x 98 g H2SO4 = 7840 g H2SO4 1 mol H2SO4 Molar mass H2SO4 = 1(2) + 32 + 16(4) = 98 grams

Electron Configuration N 7 = 1s22s22p3

Electron Configuration S 32 S 32 = 1s22s22p63s23p64s23d104p2