Why is coal slurry a problem?
What will be an ideal response?
Coal slurry is stored at the processing site behind dams in open ponds. Leakage from these ponds pollutes local streams and failure of the dams have caused floods.
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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 number of moles of NH3 obtained if 4.2 mol of N2 react completely to form NH3 C) both a and b D) neither a nor b
Zinc can be uniformly mixed in differing amounts in copper to an alloy called brass. Brass is an examples of which of the following?
A) compounds B) elements C) homogeneous mixtures D) heterogeneous mixtures
In the Early Cambrian, there was a great diversity of fauna that represented many phyla that exist
today. Indicate whether the statement is true or false.
Ocean sediments consist of particles that have slowly settled out of the water by which of the following the processes?
A) Grain lithification B) Paleooceanography C) Porosity reduction D) Sediment compaction E) Suspension settling