The answer is (3), BaCl2 and N2O4. In this choice, BaCl2 is ionic compound and N2O4 is molecular compound. For others, NaOH and BaSO4 are ionic compounds. N2, SO2, Cl2, and H2S are molecular compounds.
Answer:
There are 3 elements, Sodium, Carbon, and oxygen. There are 2 Sodium atoms 2*2=4, one carbon, and 3 Oxygen so 4+1+3=8 total atoms. one compound CO3
Explanation:
that's all I know
Not 100% sure, but I'd have to say this:
When rounding for sig figs, you look at the other numbers in your calculation and see which one has the least amount of sig figs. This number is 2.70. (3 sig figs). So, you round to 3 significant figures in your calculation.
Hope this helped!
The answer is natural gasses
