7D m V D. Density V = 825 cm3 m = DV D = 13.6 g/cm3 An object has a volume of 825 cm3 and a density of 13.6 g/cm3. Find its mass.GIVEN:V = 825 cm3D = 13.6 g/cm3m = ?WORK:m = DVm = (13.6 g/cm3)(825cm3)m = 11,220 gDmV
8Problem Solving Steps 1 Givens: Include quantity, number, & unit symbols2 Unknowns:Include quantity & unit symbols3 Equations:Base equation & manipulated equation4 Answer:Do the units agree? Is it reasonable?
9D m V D. Density D = 0.87 g/mL V = m V = ? m = 25 g V = 25 g 0.87 g/mL 1) A liquid has a density of 0.87 g/mL. What volume is occupied by 25 g of the liquid?GIVEN:D = 0.87 g/mLV = ?m = 25 gWORK:V = mDDmVV = g0.87 g/mLV = 28.7 mL
10D m V D. Density m = 620 g D = m V = 753 cm3 D = ? D = 620 g 753 cm3 2) You have a sample with a mass of 620 g & a volume of 753 cm3. Find density.GIVEN:m = 620 gV = 753 cm3D = ?WORK:D = mVDmVD = g753 cm3D = 0.82 g/cm3