you have a great start on writing the molecular equation
i'm sure your teacher will be really impress to know that you are learning this on your own
for the 1st compound: silver nitride
the chemical formula is: Ag(III)N
yups... not AgN3, because you do not have 3 Nitrogens
there is only 1 silver and 1 nitrogen total
the roman numeral III stands for the charge on Ag
since it is a transition metal, it can be written in certain ways due to the electron configuration. i'm not too good at explaining this, but i'm sure your teacher will go into the detail of how silver can be in the stage of AgI, AgII and AgIII in your chemistry class.
for the 2nd compound: monoxide monochloride
yups! you are correct with the chemical formula
just one tiny alternation, it should be written as ClO-
there is a general trend that compounds are arranged, usually cation goes first (on the left) and anion goes after it (towards the right side of the formula) nevertheless, both Chloride and Oxygen are anion in this case. It takes some experience to know the order, but i'm sure you'll the trend as you pratice more
in addition, there is a negative sign next to the O because this molecule is negatively charged. meaning that it has one more electron that started with to fullfill the octate rule.
The octet rule is a simple chemical theory that states that atoms tend to combine in such a way that they each have eight electrons in their valence shellssince Cl has 7 electrons, and O has 6 electrons, Cl+O has a total of 13 electron
but when we draw out the structure and fulfill the octet rule, it comes out to be a total of 14 electrons, therefore we put a "-" sign to represent the extra electron.
for the 3rd compound: sodium silicate
the chemical formula is: Na2SiO3
you are really close
since SiO3 has a -2 charge, and Na has a + charge
you will need 2 Na to balance the silicate (SiO3)2-
therefore the end formula is: Na2SiO3
does my explaination help??
I hope I didn't confuse you more.
I don't know how much chemistry did you have before
so some of the terms might not make sense to you
feel free to e-mail me if you want to learn more about writing a chemical formula
writing chemical formula is not hard, it just take a few practices, and I can see that you are getting a great start.
good work!!!!