Answer:
7 = 2.3× 10⁺⁹ mm
8 = The density of copper is 6.55g/cm³ so the given metal is not copper.
9 = mass of liquid is 7.8 g
10 = mass of liquid is 8050 g.
Explanation:
7. How many mm are there in 2.3Mm?
mm is the symbol of millimeter.
Mm is the symbol of megameter.
1 mm = 10⁻⁹Mm
so in order to convert 2.3Mm into mm we will multiply the given value with 10⁺⁹
2.3 mm × 10⁺⁹ = 2.3× 10⁺⁹ mm
8. Copper has a density of 6.55g/cmº. A. piece of metal has a mass of 48.3g and a volume of 7.2cm.
Is this metal copper?
Given data:
Density of copper = 6.55 g/cm³
Mass of metal = 48.3 g
Volume of metal = 7.2 cm³
Is the metal is copper = ?
Solution:
The given problem will be solved through the density formula.
D = m/v
We will put the values in formula to calculate the density.
d = 48.3 g/ 7.2 cm³
d = 6.71 g/cm³
The density of copper is 6.55g/cm³ so the given metal is not copper.
9. What is the mass of a liquid whose volume is 6.0 mL and a density of 1.3 g/cm??
Given data:
Volume of liquid = 6.0 mL (1 mL = 1cm³)
Density of liquid = 1.3 g/cm³
Mass of liquid = ?
Solution:
Formula:
D = m/v
By putting the values in formula.
1.3 g/cm³ = m / 6 cm³
m = 1.3 g/cm³ × 6 cm³
m = 7.8 g
mass of liquid is 7.8 g.
10. You have 3.50 L of a liquid, whose density is 2.3g/cm3. What is it's Mass?
Given data:
Volume of liquid = 3.50L (3.50 ×1000 = 3500 cm³)
Density of liquid = 2.3g/cm³
Mass of liquid = ?
Solution:
Formula:
D = m/v
By putting the values in formula.
2.3g/cm³ = m /3500cm³
m = 2.3 g/cm³ × 3500 cm³
m = 8050 g
mass of liquid is 8050g.
