For the reaction 2 N2(g) + 3 H2(g) ? 2 NH3(g) which of the following can be determined using only the coefficients of the balanced chemical equation?
A) the number of molecules of NH3 obtained if 4.2 mol of N2 react completely to form NH3
B) the weight of NH3 obtained if 4.2 mol of N2 react completely to form NH3
C) both a and b
D) neither a nor b
D
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The European Union's REACH (Registration, Evaluation, Authorization and restriction of chemicals) program ________
A) is enforced by the FDA B) was originally enacted to protect endangered species C) was ordered by the Stockholm Convention of 1949 D) shifts the burden of testing chemical safety from government to industry E) was originally enacted to protect agriculture
A town on the ocean has beautiful beaches that generate considerable tourist income. The effect of ocean currents and storms has reduced the width of the beach near the town center, and the government is considering several mitigation ideas. Which action would be the LEAST appropriate response??
a. ?Build picnic structures and parking at other beaches up and down the shore. b. ?Give tax breaks to companies that develop tourist activities that do not depend on the beach. c. ?Make a small increase in the hotel tax and use the money to dredge sand from offshore and build the central beach back up. d. ?Build a large rock jetty that blocks the currents around the central beach. e. ?Erect a pavilion beside the central beach to host music festivals and public events.
Which relates to weather rather than climate?
a. The average temperature for the month of January is 28 oF b. the lowest temperature ever recorded in Frozenlake, Minnesota is -57 oF c. the foggiest month of the year is December d. I like the warm, humid summers e. Outside it is cloudy and snowing
Sacred spaces are sacred because
A) of a miracle that occurred there. B) God makes it so. C) people make them so. D) houses of worship (e.g., temples, mosques, churches, monasteries) are located there. E) religious figures have died there.