Which statement concerning how geologists locate an earthquake's epicenter are accurate? check all that apply A. Geologists use seismic waves to locate the center of an earthquake.
B. The epicenter of an earthquake is located at the same place as the seismograph.
C. Geologists use data from two data stations to determine the location of an earthquake.
D. Geologists use data from three or more data stations to determine the location of the epicenter.
E. A seismograph measures the difference between arrivals of P waves and S waves.

b.final

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.