1) Indicar el número de oxidación de cada uno de los elementos en los siguientes compuestos:  CH4
 Na2O
 Cr2O7
2) Oxide los siguientes compuestos (Con cada una de las valencias mencionadas):
BeO (valencia del Berilio +2 y oxigeno -2)
ClO (Valencias del Cloro +1,+3,+5, +7 y Oxigeno -2)
NiO (Valencias del Niquel +2,+3 y oxigeno -2)

Coal i believe hope this

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.

Okay well gravitational energy is matter forced by gravity making energy though the kinetic energy then the electric energy produces electricity from the kinetic energy and the kinetic energy gets its energy from the gravitational energy. was that the answer you wanted or something else?  

Answer//the law of conservation of mass.;