Question

The radius of a water molecule is about 1.4 angstroms. One angstrom is 0.00000001 cm. What is the diameter of a water molecule in centimeters?

Answer 1

Diameter :D , Raduis : R
D = 2R
R = 1.4 angstrom
1 angstrom = 0.00000001 cm = 10^-7
cm
R = 1.4 * 10^-7 cm
D = 2.8 * 10^-7 cm

Answer 2

radius of a circle is half of the diameter

Diameter :D , Raduis : R
D = 2R
R = 1.4 angstrom
1 angstrom = 0.00000001 cm = 10^-7 cm
R = 1.4 * 10^-7 cm
D = 2.8 * 10^-7 cm

The Diameter is 2.8x10^-7 cm