A13.00 g sample of citric acid reacts with an excess of baking soda as shown in the equation. what is the theoretical yield of carbon dioxide?

Chemical equation of the reaction between citric acid and baking soda:



Ratios

Citric Acid        Baking soda    ->  Sodium Citrate  Water    Carbon Dioxide
C6H8O7                                                                                CO2
1 mole                                                                                     3moles

Molecular masses
Citric acid
6*12 + 8*1 + 7*16 = 192 g/mole
Carbon dioxide
12 + 2*16 =   44 g/mole

Proportion carbon dioxide / citric acid

3 * 44 g of carbon dioxide / 192 g of citric acid

132 g of carbon dioxide / 192 g of citric acid

13.00 g of citric acid * [132 g of carbon dioxide / 192 g of citric acid] =  8.94 g of carbon dioxide.

8.94 grams.

The answer is c) pyrite