0.64 g of copper when heated in air forms 0.80 g of copper oxide. What is the simplest formula of copper oxide?

(Ar: O= 16; Cu= 64)

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Draw two cyclic constitutional isomers of cis-1

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.