Inches because that is a trait of measurement
The answer should be; 11
The atomic mass number is found by combining the number of protons and neutrons
Hope this helps :)
A typical human hair is about 1 million carbon-12 atoms JUST IN WIDTH.
40.0 g ( 1 mole ) --------------- 6.02x10²³ molecules
? ? --------------------------- 2.90x10²² molecules
mass = 2.90x10²² * 40.0 / 6.02x10²³
mass = 1.16x10²⁴ / 6.02x10²³
mass = 1.9269 g
hope this helps!