1. Density questions

4. TAKS formula chart
Density formula is here.

5. Finding volumes of regular objects and irregular objects.

6. 1) Measure the volume of liquid in a partially filled graduated cylinder,
2) Add the solid (making sure it is submerged) and note how the level of the liquid goes up,
3) Measure the combined volume of the solid and liquid. The difference between the initial and final volumes is the volume of the solid.

7. http://www. syvum. com/cgi/online/serve
Try this hyperlink’s 10 questions to see if you understand the concept of density.
Metal
Density
Gold
19.3
Silver
10.5
Platinum
21.4
Palladium
12.0
Copper
9.0
9ct
10.9 to 12.7
14ct
12.9 to 14.6
18ct Yellow
15.2 to 15.9
18ct White
14.7 to 16.9
22ct
17.7 to 17.8
Sterling Silver
10.2 to 10.3
950 Platinum
20.1

8. Density less than ‘1’ floats on water.
Density more than ‘1’ sinks in water.

9. What is the mass of a 600.00 mL sample of seawater with a density of 1.025 g/mL?
D = m ÷ v
1.025 = ? ÷ 600
1.025 x 600 = ? ÷ 600 x 600 =

10. volume
What is the density at 20oC of 16.0 milliliters of a liquid that has a mass of 3.05 grams?
5.25 g/mL
48.8 g/mL
0.191 g/mL
0.320 g/mL
mass
3.05 / 16 = .1906

11. A sample of an element has a volume of 68. 0 mL and a density of 1
A sample of an element has a volume of 68.0 mL and a density of 1.85 g/mL. What is the mass in grams of the sample?
1.85 x 68 = grams

12. A block of maple wood with a volume of 8
A block of maple wood with a volume of 8.05 cubic centimeters and a density of 0.67 g/cm3 is sawed in half. The density of the two smaller blocks is now—
One fourth the original density.
The same as the original density.
One half the original density.
Two times the original density.

13. Which of the following objects will float in water?
a cube with a mass of 25 g and a volume of 20 mL
a cube with a mass of 36 g and a volume of 35 mL
a pyramid with a mass of 29 g and a volume of 32 mL
a pyramid with a mass of 28 g and a volume of 26 mL
The one who’s density is less than 1.

14. If the properties of water were to change so that the solid form was denser than the liquid form, organisms living in a cold pond environment would be less likely to survive because water would no longer –
●Dissolve enough oxygen from the air.
●Produces solutions containing vital nutrients.
●Remain neutral, instead becoming highly acidic.
●Produce a floating insulation layer of ice.

15. The table shows the physical properties of selected metals.
A cube of an unknown metal has a volume of 2.25 cm3 and a mass of 16.2 g. Based on data in the table above, what is the identity of this metal?
A. bismuth.
B. chromium.
C. polonium.
D. ruthenium.
Mass / volume= density /2.25 = 7.2

16. Use this hyperlink to practice doing more density problems
Use this hyperlink to practice doing more density problems. Have a calculator handy. Click on 'New Problem'