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“The Density Equation”. D= m 1 V. Density (g/ mL or g/cm 3 ). Mass (g). Volume (mL or cm 3 ). Liquid - graduated cylinder Read at the meniscus. Irregular Solid - displacement. Measuring Volume. Regular Solid - L x W x H = cm 3. Let’s Practice….

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the density equation
“The Density Equation”

D= m

1 V

Density (g/mL or g/cm3)

Mass (g)

Volume (mL or cm3)

slide2

Liquid-graduated cylinder

        • Read at the meniscus

Irregular Solid -displacement

Measuring Volume

Regular Solid -L x W x H = cm3

let s practice
Let’s Practice…

If the mass of an object is 6 grams and the volume is 3 mL, what is the density of the object?

Step 1 Step 2 Step 3 Step 4

6g

m =

V =

D =

D = 2 g/mL

D = m

1 V

D = 6g

3mL

3mL

?

let s practice1
Let’s Practice…

If the density of an object is 2 g/mL and the volume is 4 mL, what is the mass of the object?

Step 1 Step 2 Step 3 Step 4

?

m =

V =

D =

m = 8 g/mL

4mL

2 g/mL

let s practice2
Let’s Practice…

If the density of an object is 5 g/mL and the mass is 15 g, what is the volume of the object?

Step 1 Step 2 Step 3 Step 4

15g

m =

V =

D =

V = 1 mL

?

15 g/mL

slide6

Warmup # ___

Calculating Density

  • If the mass of an object is 20 g and the volume of the object is 50 cm3, what is the density? Will it sink or float in H2O?
  • If the mass of an object is 12 g and the dimensions are 2cm x 2cm x 3cm, what is the density of the object?
  • What is the mass of an object with a volume of 2 cm3 and a density of 6 g/cm3?
  • What is the volume of a object with a mass of 24 g and a density of 8 g/mL?