1. DENSITYDENSITY

2. Review DENSITY_COMPUTATION slide found on the SCIENCE weebly site. Graded Worksheet tom.

3. DENSITY = MASS / VOLUME DENSITY= grams/ mL or kg/L VOLUME= MASS / DENSITY MASS= DENSITY X VOLUME Note: Higher density sinks/ stays at the bottom and lower density stays on top/ floats.

4. Lowest Density = Lamp Oil Highest Density = Honey The substance that stays on top has the lowest density and the substance that stays at the bottom has the highest density.

5. PROBLEM I 1. What is the density of CO gas if 0.196 g occupies a volume of 100 ml?

6. PROBLEM II 2) Mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. The mercury used to fill the cylinder weighs 306.0 g. From this information, calculate the density of mercury.

7. PROBLEM III 3. An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 2 ml. The height of the water rose to 7 ml. If the mass of the stone was 25 g, what was its density?

8. PROBLEM IV 4. Silver has a density of 10.5 grams/cm3 and gold has a density of 19.3 g/cm3. Which would have the greater mass, 5cm3 of silver or 5cm3 of gold?

9. PROBLEM V 5. Five mL of ethanol has a mass of 3.9 g, and 5.0 mL of benzene has a mass of 44 g. Which liquid is denser?

10. DENSITY OF WATER = 1 g/mL FORMULAMASSVOLUMEDENSITYSINK/FLOAT ?30 grams80 mL?? 1II6 mL2.5 g/mLIII IV50 gramsV0.5 g/mLVI VII77 grams140 mLVIIIIX XXI38 mL4.5 g/mLXII

11. PROBLEM I 1. What is the density of CO gas if 0.196 g occupies a volume of 100 ml? Density= Mass/ Volume Density= 0.196g / 100 mL Density= 0.00196 g/ mL

12. PROBLEM II 2) Mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. The mercury used to fill the cylinder weighs 306.0 g. From this information, calculate the density of mercury. Density= Mass / Volume Density= 306 g/ 22.5 mL Density= 13.6 g/ mL

13. PROBLEM III 3. An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 2 ml. The height of the water rose to 7 ml. If the mass of the stone was 25 g, what was its density? Density= Mass / Volume Density= 25 g/ (7 mL - 2 mL) = 25 g/ 5 mL Density= 5 g/ mL

14. PROBLEM IV 4. Silver has a density of 10.5 grams/cm3 and gold has a density of 19.3 g/cm3. Which would have the greater mass, 5cm3 of silver or 5cm3 of gold? Mass= Density x Volume Mass (silver)= 10.5 g/cm3 x 5 cm3= 52.5 cm3 Mass (gold)= 19.3 g/ cm3 x 5 cm3= 96.5 cm3 (greater)

15. PROBLEM V 5. Five mL of ethanol has a mass of 3.9 g, and 5.0 mL of benzene has a mass of 44 g. Which liquid is denser? Density= Mass / Volume Density ethanol = 3.9 g/ 5 mL= 0.78 g/mL Density benzene = 44 g/ 5 mL= 8.8 g/mL Benzene is denser than ethanol.

16. DENSITY OF WATER = 1 g/mL FORMULAMASSVOLUMEDENSITY SINK/FLOA T D=M/V30 grams80 mL0.375 g/mLfloat M=D x V15 grams6 mL2.5 g/mLsink V= M/D50 grams100 mL0.5 g/mLfloat D=M/V77 grams140 mL0.55 g/mLfloat M=D x V171 grams38 mL4.5 g/mLsink