Which of the following sets of descriptors matches the molecule below? Image of two oxygen atoms bonded together to form O2.

A. Compound, allotrope, double bond, one element
B. Molecule, compound, single bond, allotrope
C. Simple structure, diatomic, double bond, molecule
D. Giant structure, single bond, compound, one element

Enzymes affect the reactions in living cells by changing the

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins.co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)