Question

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Answer 1

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.