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Calculate the surface area in nm^2 of water contained in a watch glass with a diameter of 9.0cm. The area of a circle is calculated as A=r^2(pi)If a molecule of stearic acid covers an area of 0.21 nm^2, how many stearic acid molecules will it take to cover the surface of the watch glass in question 3.

Question

Calculate the surface area in nm^2 of water contained in a watch glass with a diameter of 9.0cm. The area of a circle is calculated as A=r^2(pi)

If a molecule of stearic acid covers an area of 0.21 nm^2, how many stearic acid molecules will it take to cover the surface of the watch glass in question 3. 

check_circleAnswer
Step 1

Given,

Diameter = ...

The formula for calculating the surface area is given below,
The surface area (a) = IIr
diameter 9.0 cm
therefore
r 4.5 cm
The surface area (a) Ir
The surface area (a) 3.14x(4.5cm)2
The surface area (a)= 63.585 cm2
The surface area (a)= 6.3585x10 m2
m 10 nm
hence
The surface area (a)= 6.3585x1015nm2
The surface area is calculated
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The formula for calculating the surface area is given below, The surface area (a) = IIr diameter 9.0 cm therefore r 4.5 cm The surface area (a) Ir The surface area (a) 3.14x(4.5cm)2 The surface area (a)= 63.585 cm2 The surface area (a)= 6.3585x10 m2 m 10 nm hence The surface area (a)= 6.3585x1015nm2 The surface area is calculated

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