Suna passes an electric current through a sample of clear, colorless, and odorless liquid. As the experiment continues, bubbles form, and the volume of liquid decreases. Suna collects samples of two colorless, odorless gases that bubble out of the liquid. One of the gases burns. Neither the original liquid nor the other gas burns. Which is the best explanation of her results? A) The electric current changed some of the sample to gas even though the sample was not breaking down. Therefore, the original liquid is a compound.B) The electric current released a gas that was odorless and colorless, like the original sample. Therefore, the original liquid is an element.C) The sample was broken down by the electric current and formed a new substance that could burn. Therefore, the original liquid is a compound. D) The sample lost some of its volume, but the gas still had the same chemical makeup as the original sample. Therefore, the original liquid is an element.

Question

31-10-2016
Chemistry

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Suna passes an electric current through a sample of clear, colorless, and odorless liquid. As the experiment continues, bubbles form, and the volume of liquid decreases. Suna collects samples of two colorless, odorless gases that bubble out of the liquid. One of the gases burns. Neither the original liquid nor the other gas burns. Which is the best explanation of her results? A) The electric current changed some of the sample to gas even though the sample was not breaking down. Therefore, the original liquid is a compound.B) The electric current released a gas that was odorless and colorless, like the original sample. Therefore, the original liquid is an element.C) The sample was broken down by the electric current and formed a new substance that could burn. Therefore, the original liquid is a compound. D) The sample lost some of its volume, but the gas still had the same chemical makeup as the original sample. Therefore, the original liquid is an element.

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Edufirst Edufirst · Answer 1 · 2016-11-09T22:46:49+01:00

Answer: option C) The sample was broken down by the electric current and formed a new substance that could burn. Therefore, the original liquid is a compound.

The use of the electric current to decompose substances is called electrolysis.

The case presented is the same of the electrolysis of water: the electrical current decomposes the water (a compound) into the elements that form it: hydrogen (a gas that burns) and oxygen (a gas that does not burn).

allystyles3369 allystyles3369 · Answer 2 · 2019-02-18T22:08:36+01:00

allystyles3369 allystyles3369

18-02-2019

The correct answer is C

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