Explicar cómo se mide la fuerza de los ácidos y las bases.​ explique como funciona la escala de pH ( los ácidos fuertes son rojos y las bases fuerte son purpuras, las sustancias neutras son verdes) utilize los números del pH escala en tu explicación?
ayuda porfa urgente

Most of the carbon on earth is stored in the form of

Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) has a single dorsal fin ® 5 (b) has a double dorsal fin ® 2 2. (a) one fin is spiny, the other is smooth ® 3 (b) one fin is not spiny or smooth ® 4 5. (a) has small fin on back near tail ® 6 (b) has no fin on back near tail ® 7 6. (a) has barbs near the mouth ® catfish (b) does not have barbs near the mouth ® 10 7. (a) tail is asymmetrical ® 8 (b) tail is symmetrical ® 9 10. (a) scales are small ® trout (b) scales are large ® whitefish what is the next step to complete to identify a fish that has a single dorsal fin, no fin on the back near the tail, and no barbs near the mouth? step 2 step 5 step 7 step 10

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic