Question

a liquid with a mass of 56g and a tablet with a mass of 14g are placed in an open beaker. how can the mass of the end solution be 68g, if the law of conservation of mass says the mass should be 70g?
a. two grams were lost as a gas during the reaction since this occurred in an open beaker.
b. forty - two grams were gained as a gas during the reaction since this occurred in an open beaker.
c. forty - two grams were lost as a gas during the reaction since this occurred in an open beaker.
d. two grams were gained as a gas during the reaction since this occurred in an open beaker.

Explanation:

According to the Law of Conservation of Mass, the total mass of reactants should equal the total mass of products. Here, the initial mass is \(56g + 14g=70g\), and the final mass is \(68g\). The difference in mass (\(70g - 68g = 2g\)) is due to gas escaping (since it's an open beaker). Mass cannot be gained in this context as per the law (unless there is an external mass addition, which is not indicated).

Answer:

A. Two grams were lost as a gas during the reaction since this occurred in an open beaker.