An 18-karat gold necklace is 75% gold by mass, 16% silver, and 9.0% copper.
a. what is the mass, in grams, of the necklace if it contains 0.24 oz of silver?
b. how many grams of copper are in the necklace.?
c. if the 18- karat gold has a density of 15.5g/cm^3, what is the volume in cubic centimeters?

You may expect bonds between two atoms which each have n covalent lonic metallic hydrogen

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o