What is the mass in grams of 5.50 mol of sodium?

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

When a septic tank backs up a goes in to clean it out

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.