Please help me on (b) 1. Gold, which has a density of 19.32 g/cm3, is the most d
ID: 2276773 • Letter: P
Question
Please help me on (b)
1. Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold with a mass of 2.477g, is pressed into a leaf of 4.116 ?m thickness, what is the area (in m2) of the leaf? (b) If, instead, the gold is drawn out into a cylindrical fiber of radius 2.100 ?m, what is the length (in m) of the fiber?
I found the answer of (a) is 0.003 m^2 but I couldn't solve (b).....
2. One molecule of water (H2O) contains two atoms of hydrogen and one atom of oxygen. A hydrogen atom has a mass of 1.0 u and an atom of oxygen has a mass of 16 u, approximately.
(b) How many molecules of water are in the world's oceans, which have an estimated total mass of 1.4
Explanation / Answer
1.
First find out the volume of gold you have:
(2.477 g)(1 cm