Consider a hypothetical reaction in which A and B are reactants and C and D are

Question

Consider a hypothetical reaction in which A and B are reactants and C and D are products. If 23 grams of A completely reacts with 29 grams of B to produce 18 grams of C, how many grams of D will be produced? A 3.4 gram sample of sodium hydrogen carbonate is added to a solution of acetic acid weighing 10.1 grams. The two substances react, releasing carbon dioxide gas to the atmosphere. After the reaction, the contents of the reaction vessel weighs 12.1 grams. What is the mass of carbon dioxide released during the reaction?

Explanation / Answer

The law of conservation of says that mass is not lost in the reaction , such that mass of reactants is equal to the mass of products.

Here A + B = 23 + 29 = 52 grams

52 grams = C + D

52 = 18 + D

D = 34

So 34 grams of D will be produced.

Likewise here,

3.4 g NaHCO3 + 10.1 g acetic acid = 12.1 + mass of CO2

Mass of CO2 = 1.4 gram

So 1.4 g of CO2 is released

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