When studying seismic records from all over the globe, what did scientists find out about the pattern of earthquakes?

a-many earthquakes are concentrated in narrow zones near earth's poles.

b-many earthquakes are concentrated in narrow zones at the centers of plates.

c-many earthquakes are concentrated in narrow zones along plate boundaries.

d-most earthquakes occur deep under the ocean.

(i was thinking c but i'm not

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

How much more basic is a solution with ph 8 than a solution with ph 7

Using this reversible reaction, answer the questions below: n2o4 2no2 (colorless) (reddish-brown) -as the temperature increased, what happened to the n2o4 concentration? -was the formation of reactants or products favored by the addition of heat? -which reaction is exothermic? right to left or left to right? -if the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct? n2o4 2no2 + 14 kcal n2o4 2no2, hr = +14 kcal n2o4 + 14 kcal 2no2 n2o4 2no2, hr = -14 kcal