Which chemical equation represents a redox reaction? HELP ME PLZ ASAP!!! A.) Ca(OH)2 +H2SO4 arrow CaSO4 + 2H20
B.) Na2CO3 + H2S arrow H2CO3 + NaS
C.) AgNO3 + NaCI arrow AgCI + NaNO3
D.) 2Ni + MgCI2 arrow 2LiCI + Mg

What is the fate of the electrons that interact with a specimen in an electron microscope?

Asubject in a clinical research trial experiences a serious, unanticipated adverse drug experience. how should the investigator proceed, with respect to the irb, after the discovery of the adverse event occurrence? a. do not report the adverse drug experience to the irb since it is a common adverse experience.b. report the adverse drug experience to the irb only if there are several other occurrences.c. report the adverse drug experience as part of the continuing review report.d. report the adverse drug experience in a timely manner, in keeping with the irb's policies and procedures, using the forms or the mechanism provided by the irb.

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?