Scrie ecuațiile reacțiilor de obținere a sulfatului de bariu utilizând în calitate de substanță inițială: a) BaO b) Ba(OH)2 c) BaCO3

the solar system used to have much dust particles option no d

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

i think it is true since you can test the answer and can use observations to complete it.

sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'