PLEASE HELP I DON'T KNOW THIS QUESTION I NEED HELP!! Two students below described a type of Earth's outermost layer:

Student A: 512 kilometers deep
Student B: Makes up the sea floor

Which type of outermost layer did the students describe?

A.) They both described the oceanic type.
B.) They both described the continental type.
C.) Student A described the oceanic type and Student B described the continental type.
D.) Student A described the continental type and Student B described the oceanic type.

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Many pharmaceutical drugs are organic compounds that were originally synthesized in the laboratory. which two scientific disciplines are bridged by pharmaceutical drugs? chemistry and forensics chemistry and medicine biology and forensics biology and criminology

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)