The density of a certain type of plastic is 0.81 g/cm3. if a sheet of this plastic is 10.0 m long, 1.0 m wide, and 1 cm thick, what is its mass?
mass = x
g
enter your answer in scientific notation.

The mass of plastic sheet is

Explanation:

The plastic sheet is in the form of cuboid. To calculate the volume of cuboid, we use the equation:

where,

V = volume of cuboid

l = length of cuboid = 10.0 m = 1000 cm     (Conversion factor: 1 m = 100 cm)

b = breadth of cuboid = 1.0 m = 100 cm

h = height of cuboid = 1 cm

Putting values in above equation, we get:

To calculate mass of a substance, we use the equation:

We are given:

Density of plastic sheet =

Volume of plastic sheet =

Putting values in equation 1, we get:

Hence, the mass of plastic sheet is

the answer is d. 74.02