Help please don’t understand! A chemist adds 195.0 mL of a 0.19M calcium bromide(CaBr2) solution to a reaction flask. Calculate the mill implies of calcium bromide the chemist has added to the flask.

Idon't understand what to put on the left lines i'm confused can anyone ?

1) how many electrons are in each energy level of the following elements? a. he b. na c. na d. ne 2) how many valence electrons are percent in the following atoms? a. s b. mg c. be d. cl 3) which of the following elements are stable as atoms? a. he b. o c. cl d. ar if you are able to provide the work as to how you got the answers that would be greatly appreciated. : )

In this synthesis reaction what products will form