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# DENSITY – THE MASS OF ONE CM 3 OR ONE ML OF A SUBSTANCE Mercury 13.6 g/cm 3 21.5 g/cm 3 Aluminum 2.7 g/cm 3 Platinum.

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DENSITY – THE MASS OF ONE CM 3 OR ONE ML OF A SUBSTANCE Mercury 13.6 g/cm 3 21.5 g/cm 3 Aluminum 2.7 g/cm 3 Platinum

Problem : A piece of copper has a mass of 57.54 g. It is 9.36 cm long, 7.23 cm wide, and 0.95 mm thick. Calculate density (g/cm 3 ).

Problem A piece of copper has a mass of 57.54 g. It is 9.36 cm long, 7.23 cm wide, and 0.95 mm thick. Calculate density (g/cm 3 ). G= U= E= S= M= 57.54 g, Length= 9.36 cm Width= 7.23 cm, Thickness0.95 mm Density= ? (g/cm 3 ) Density= mass volume Volume = l x w x h 0.95 mm x 1 m x 10 2 cm 10 3 mm 1 m =0.095 cm 3 Volume = 9.36 cm x7.23 cm x 0.095 cm = 6.4 cm 3 Density= 57.54 g 6.4 cm 3 =8.990625 or 9.0 g/cm 3

PROBLEM: MERCURY (HG) HAS A DENSITY OF 13.6 G/CM 3. WHAT IS THE MASS OF 95 ML OF HG IN GRAMS?

PROBLEM: MERCURY (HG) HAS A DENSITY OF 13.6 G/CM 3. WHAT IS THE MASS OF 95 ML OF HG? G= U= E= S= D= 13.6 g/cm 3, Volume = 95mL Mass=? Density= mass volume Mass= density x volume Mass= 13.6 g/cm 3 x 95mL1 cm 3 = 1 mL 1292g1300 g

LEARNING CHECK Osmium is a very dense metal. What is its density in g/cm 3 if 50.00 g of the metal occupies a volume of 2.22cm 3 ? A) 2.25 g/cm 3 B)22.5 g/cm 3 C)111 g/cm 3 G= U= E= S=

VOLUME/WATER DISPLACEMENT A solid displaces a matching volume of water when the solid is placed in water. What is the volume of the metal object. 33 mL 25 mL V= 33mL-25mL 8 mL

What is the density (g/cm 3 ) of 48 g of a metal if the metal raises the level of water in a graduated cylinder from 25 mL to 33 mL? G U E S S M= 48 g V= 8 mL V= 8 cm 3 D= g/cm 3 D= mass Volume D= 48 g 8cm 3 D= 6.0 cm 3

LEARNING CHECK Which diagram represents the liquid layers in the cylinder? (K) Karo syrup (1.4 g/mL), (V) vegetable oil (0.91 g/mL,) (W) water (1.0 g/mL) A)B) C) K K W W W V V V K

LEARNING CHECK Which diagram represents layers in the cylinder? Each layer represent a different phase or state of matter (I) Solid water (ice) (0.9 g/mL), (V) Water vapor (0.84 g/mL,) (W) liquid water (1.0 g/mL) (W) liquid water (1.0 g/mL) A) B.) C) I I V V V W W W I

SOLUTION (K) Karo syrup (1.4 g/mL), (V) vegetable oil (0.91 g/mL,) (W) water (1.0 g/mL) 1) K W V

EXIT TICKET The table below shows some information for four different elements. A cube of an unknown element has a shiny silvery color. The side of the cube measures 3.0 cm and the cube has a mass of 194.4 g. Based on the information provided, which element makes up the cube? A barium B beryllium C chromium D phosphorous

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