PLEASE HELPPP
a student observed a chemical reaction in which the mass of the products was measured to be less than the mass of the reactants. How can this be explained?

A) the mass of the products is always less than the mass of the reactants in a chemical reaction

B) some of the products must have escaped undetected

C) the law of conversation of mass does not apply to chemical reactions

D) some of the matter was converted into energy during the reaction

Question

14-10-2018
Chemistry

contestada

PLEASE HELPPP
a student observed a chemical reaction in which the mass of the products was measured to be less than the mass of the reactants. How can this be explained?

A) the mass of the products is always less than the mass of the reactants in a chemical reaction

B) some of the products must have escaped undetected

C) the law of conversation of mass does not apply to chemical reactions

D) some of the matter was converted into energy during the reaction

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RonnelCruzado RonnelCruzado · Answer 1 · 2018-10-14T19:15:45+02:00

RonnelCruzado RonnelCruzado

14-10-2018

the answer is either D or B but I would choose B because matter cant really be converted to energy.
Final answer- B

Answer Link

extensionprenton extensionprenton · Answer 2 · 2020-02-12T20:03:14+01:00

Answer:

The correct answer is option B) "some of the products must have escaped undetected".

Explanation:

The law of conservation of mass by Antoine Lavoisier states that in a closed system mass cannot be created or destroyed. Chemical reactions follow this law and in theory, the mass of the products must be equal to the mass of the reactants. If a student observed that the mass of the products was less than the mass of the reactants, it is very likely that some of the products must have escaped undetected. This happens when the chemical reactions produce traces of byproducts or when the chemical reactions are not performed in a closed system.