Why do some atoms form ions such as carbonates (), when atoms bond to “fill their valence electrons”?

How many moles are in 7.2 x 10^23 carbon molecules? (*round to the nearest hundredth and include the unit "mol c" after your number) question 6 options:

Consider this initial-rate data at a certain temperature for the reaction described by

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.