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Science Yr2 Lesson 8
Science Year 2 lesson 8
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Slide 1:
Tekstslide
Science
Middelbare school
havo, vwo
Leerjaar 2
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19 slides
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Lesduur is:
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Science Year 2 lesson 8
Slide 1 - Tekstslide
Slide 2 - Tekstslide
Today
1.3: density
- preparing for test 1.1-1.3 (2rd of October)
Slide 3 - Tekstslide
Learning Goals
I can…
Explain the concept of density
Calculate the density of a substance using the density formula.
Use density to determine the mass or volume of a substance
Use density to identify an unknown substance
Slide 4 - Tekstslide
Key Words
Mass
Volume
Density
Slide 5 - Tekstslide
Density
Density
= a measure how much matter is packed into a given area.
It is a property of a substance.
The closer the molecules are, the greater the density.
Density tells us how many grams of matter there are per a unit of volume.
Slide 6 - Tekstslide
What is the formula for density?
Slide 7 - Open vraag
Density calculations
Common units:
grams per cubic centimeter (g/cm3)
grams per milliliter (g/mL)
Slide 8 - Tekstslide
What is the density of polonium in grams per cubic centimeter if a 0.277 g sample has a volume of 0.0297 cm3 (rounding to 2 digits)?
Slide 9 - Open vraag
Density calculations
m = 0,277 g
V = 0,0297 cm
3
ρ = m/V = 0,277 / 0,0297 = 9,33 g/cm3
Slide 10 - Tekstslide
What is the density of stainless steel in grams per cubic centimeter if a 2.92 g sample has a volume of 0.390 cm3 (rounding to 2 digits)?
Slide 11 - Open vraag
Density calculations
m = 2,92 g
V = 0,390 cm
3
ρ = m/V = 2,92 / 0,390 = 7,49 g/cm3
Slide 12 - Tekstslide
Density calculations
Slide 13 - Tekstslide
What is the volume of lead in cubic centimeters of a 84,3 g sample if its density is 11.3 g/cm3 (rounding to 2 digits)?
Slide 14 - Open vraag
Density calculations
m = 84,3 g
ρ = 11,3 g/cm3
V = m/ρ = 84,3 / 11.3 = 7,46 cm3
Slide 15 - Tekstslide
What is the mass of yellow brass in grams of a 0.146 cm3 sample if its density is 8.47 g/cm3 (rounding to 2 digits)?
Slide 16 - Open vraag
Density calculations
V = 0,146 cm
3
ρ = 8,47 g/cm3
m = ρ x V = 8,47 x 0.146 = 1,24 g
Slide 17 - Tekstslide
What is the volume of lead in cubic centimeters of a 84,3 g sample if its density is 11.3 g/cm3 (rounding to 2 digits)?
Slide 18 - Open vraag
Homework for next time
Complete the exercises of section 1.3
Study the glossary of Topic 1.1 - 1.3 on StudyGo.
Slide 19 - Tekstslide
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