We need to write the chemical formulas for the given compounds. Each compound's name provides clues about its composition and the ratio of its constituent elements.
Sodium carbonate consists of sodium (Na) and carbonate (CO3_33). Sodium has a charge of +1, and carbonate has a charge of -2. To balance the charges, we need two sodium ions for every carbonate ion.
Sodium carbonate: Na2CO3 \text{Sodium carbonate: } \text{Na}_2\text{CO}_3 Sodium carbonate: Na2CO3
Nitrogen dioxide consists of one nitrogen (N) atom and two oxygen (O) atoms.
Nitrogen dioxide: NO2 \text{Nitrogen dioxide: } \text{NO}_2 Nitrogen dioxide: NO2
Aluminum nitrate consists of aluminum (Al) and nitrate (NO3_33). Aluminum has a charge of +3, and nitrate has a charge of -1. To balance the charges, we need three nitrate ions for every aluminum ion.
Aluminum nitrate: Al(NO3)3 \text{Aluminum nitrate: } \text{Al(NO}_3\text{)}_3 Aluminum nitrate: Al(NO3)3
a. Sodium carbonate: Na2CO3b. Nitrogen dioxide: NO2c. Aluminum nitrate: Al(NO3)3 \boxed{ \begin{aligned} \text{a. Sodium carbonate: } & \text{Na}_2\text{CO}_3 \\ \text{b. Nitrogen dioxide: } & \text{NO}_2 \\ \text{c. Aluminum nitrate: } & \text{Al(NO}_3\text{)}_3 \\ \end{aligned} } a. Sodium carbonate: b. Nitrogen dioxide: c. Aluminum nitrate: Na2CO3NO2Al(NO3)3
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