Title: Density Equations Date: Objective: Practice density equations by answering density story problems. Helpful Info: Mass units are grams (g) Volume units are in (mL) , (cm3), (cc) Formulas- Mass / Volume = Density Mass /Density = Volume Density x Volume = Mass
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Title: Density Equations Date: Objective: Practice density equations by answering density story problems. Helpful Info: Mass units are grams (g) Volume.
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Title: Density Equations Date:Objective: Practice density equations by answering density story problems.Helpful Info:
Mass units are grams (g)Volume units are in (mL) , (cm3), (cc)
Formulas- Mass / Volume = Density Mass /Density = Volume Density x Volume = Mass
Make a chart like the one below and fill it out as you do the story problems.
Practice Problems:1.Formula___________ Equation___________2. Formula____________ Equation___________
21. Formula___________ Equation__________
1. A block of ice has a volume of 19cm3. Its mass is 17.5 g. What is its
density?
Formula: Density = Mass /VolumeEquation: 17.5g/ 19cm3 = 0.9g/ cm3
2. Suppose 10 mL of water has a mass of 10g. What is the density of the
water?
Formula: Density = Mass / VolumeEquation: 10g /10 Ml =1g/ mL
3. An old piece of silver jewelry has a mass of 20g and a volume of 1.9
cm3 What is its density?
Formula: Density = Mass /Volume Equation: 20g / 1.9cm3 = 10.5g/cm3
4. Steel has a density of 7.8 g/cm3 . If the mass of a piece of steel is 234 g,
Hint: Rocks are more dense than water. The answer would have to be more than the density of water
which is 1g/mL.
Answer: Letter ‘C’ with 5 g/cm3 is the next most dense after water with letter ‘D’ extremely dense, not a good choice.
*16. A rock dropped in a graduated cylinder raises the level of water from 20
to 35 mL. The rock has a mass of 45 g. What is the density of the rock?
A. 1.3 g/cm3 B. 2.3 g/cm3 C. 3.0 g/mL D. 4.5 g/cm3
Formula: Density = Mass/Volumedisplacement from 20mL to 35ml is = 15mLEquation: 45g/ 15mL = 3.0g/mL
*17. Water has a density of 1 gram/milliliter. There are four rocks
that all have the same volume of 5 cubic centimeters. The mass for each of these rocks is given below. Which of the four rocks will float when placed in
water?
A. 15 grams B. 10 grams C. 6 grams D. 4 grams
Formula: M/V=D X/5= (<1)
Answer : A. 15/5=3B. 10/5=2C. 6/5=1.2D. 4/5=0.8 *
*18. A liquid is found to have a volume of 75 mL in a graduate. When placed on a balance, the
liquid and graduated cylinder have a mass of 125 g. The empty graduated
cylinder has a mass of 50 g. What is the density of the liquid?