Express the concentration of a 0.0390 m aqueous solution of fluoride, f–, in mass percentage and in parts per million. assume the density of the solution is 1.00 g/ml.

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.

Which of the following elements is most likely to have an oxidation state of +2? a. oxygen (0) b. sodium (na) c. chlorine (ci) d. strontium (si)