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If a rock has a mass of l0 g and if it is placed in a graduated cylinder filled with 35 ml of liquid and then raises the volume to 47.5 ml, what is its density? |
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Answer» They are related by the density triangle.Explanation:They are related by the density triangle.d = mVm = d×VV = mdDENSITYDensity is defined as mass per UNIT volume.d = mVExample:A brick of salt measuring 10.0 cm x 10.0 cm x 2.00 cm has a mass of 433 G. What is its density?Step 1: Calculate the volumeV = lwh = 10.0 cm × 10.0 cm × 2.00 cm = 200 cm³Step 2: Calculate the DENSITYD = mV = 433g200cm³ = 2.16 g/cm³MASSd = mVWe can rearrange this to get the expression for the mass.m = d×VExample:If 500 mL of a LIQUID has a density of 1.11 g/mL, what is its mass?m = d×V = 500 mL × 1.11g1mL = 555 gVOLUMEd = mVWe can rearrange this to get the expression for the volume.V = mdExample:What is the volume of a bar of gold that has a mass of 14.83 kg. The density of gold is 19.32 g/cm³.Step 1: Convert kilograms to grams.14.83 kg × 1000g1kg = 14 830 gStep 2: Calculate the volume.V = md = 14 830 g × 1cm³19.32g = 767.6 cm³ |
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