Transcript Lesson 12 Calculations with Density

Lesson 12
Calculations
with
Density
Density
=
mass
volume
The unit for density is either g/mL or g/cm3.
1 mL = 1 cm3
1. Given that a 2.44 cm3 sample of an element has a mass of 47.14 g.
Determine the density and the element.
Density
=
mass
volume
D
=
47.14 g
2.44 cm3
D
=
19.3 g/cm3
What do you yell to get someone’s attention?
Au
2. Determine the volume of a 60.50 g sample of a liquid with a density
of 1.56 g/mL.
60.50 g x 1 mL
1.56 g
= 38.8 mL
3 sig. figs
3. Determine the mass of a 85.0 cm3 sample of lead.
Do some research to find density of lead.
Chemistry: Periodic Table and More
Density = 11.34 g/cm3
85.0 cm3 x 11.34 g
1 cm3
= 964 g
3 sig. figs.
4. Determine the volume in mm3 of a 15. g sample of lead.
Density = 11.34 g/cm3
15. g
x
1
cm3
11.34 g
x 1000 mm3
1 cm 3
= 1.3 x 103 mm3
5. Determine the mass of a 208 mm3 sample of lead.
Density = 11.34 g/cm3
208 mm3
x
1 cm3
1000 mm3
x
11.34 g
1 cm3
= 2.36 g
6. What volume of sample of lead (11.34 g/mL) has the same mass as
45.00 mL of Ag (19.32 g/mL).
45.00 mL x
19.32 g
1 mL
x
1 mL
11.34 g
= 76.67 mL
6. Determine the volume in mm3 of a 1.0 x 10-8 ton sample of silver.
Chemistry: Periodic Table and More
Density = 10.5 g/cm3
1.0 x 10-8 ton x 2000 lbs x 1 kg x 1000 g x 1 cm3 x 1 x 103 mm3
1 ton
2.21 lbs 1 kg
10.5 g
1 cm3
Density of Coke
= 0.86 mm3