Will award ! fill in the chart below (table below) by writing formulas for the compounds that might form between the ions in the columns and rows. some of these compounds don’t exist but you can still write formulas for them p. s.(i tried) | |na+| |ca2+| |fe3+| |nh^+4| |sn^4+| no^− so2^− cl^− s2^− po3^− oh− cr2o2^− co2^−

Okay, I won't do every single one but i'll do a few so you can see how to work it out.

You want the charges to = 0 so that the compound is neutral.

Take Na+ and Cl-

This is a 1:1 ratio so you need 1 Na+ to balance the charges hence the equation is NaCl

For Na+ and CO2^3- the ratio is 1:3 so you need 3 Na

Na3CO2

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.