Two chemical reactions are shown:

ca(oh)2 → cao + h2o
4k + o2 → 2k2o

which statement is true?

a. both are synthesis reactions.

b. both are decomposition reactions.

c. a is a synthesis reaction, and b is a decomposition reaction.

d. a is a decomposition reaction, and b is a synthesis reaction.

Supongamos que estás estudiando dos estrellas. ambas estrellas tienen la misma magnitud aparente, pero la estrella a tiene una magnitud absoluta mayor que la estrella b. ¿que puedes decir acerca de la distancia a la tierra de estas dos estrellas?

Astudent made the lewis dot diagram of a compound shown. what is the error in the lewis dot diagram? a)an o atom should transfer all of its six electrons to mg because the formula is mgo b) both electrons of mg should be transferred to one o adam because the formula is mgo c) the electrons should be transferred from each o add him to capital mg because mg has fewer electrons d) the number of dots around mg should be four because it has to transfer two electrons to each o

All of the following are part of the biosphere except