Which is an element?

A. A carbon dioxide molecule

B. A copper pipe

C. Phosphorous and lithium joined together

D. An alloy of copper and iron

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?

Given the following information: mass of proton = 1.00728 amu mass of neutron = 1.00866 amu mass of electron = 5.486 × 10^-4 amu speed of light = 2.9979 × 10^8 m/s calculate the nuclear binding energy (absolute value) of 3li^6. which has an atomic mass of 6.015126 amu. j/mol.

What is the mass of phosphorous in a 51-kg person