What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate

I believe the answer is B. Sodium carbonate

Answer : The correct option is, (B) Sodium carbonate

Explanation :

It is an ionic compound because sodium element is a metal and carbonate ion is polyatomic ion. When the metal element combine with the polyatomic ion they form ionic compound.

= carbonate ion

While naming of ionic compounds, we write cation first then anion. Here anion is a polyatomic ion. So, the name of the compound is, sodium carbonate.

Hence, the correct option is, (B) Sodium carbonate

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e