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OlgaM077 [116]
4 years ago
6

If a substance undergoes electrolysis and a brown solid forms on one electrode and a gas on the other, from this we can conclude

the original substance must have been: a. An element b. A compound c. A mixture
Chemistry
1 answer:
andrew-mc [135]4 years ago
7 0

Answer:

b. a compound.

Explanation:

Electrolysis is described as a mechanism in which ionic compounds are decomposed into their elements by transmitting a direct electric current via the compound in a liquid state. At the cathode, the cations are reduced and anions at the anode are oxidized. There is an exchange between ions and atoms in the electrolysis process caused by the addition or removal between electrons from the external circuit. As per the question, the original substance is a compound because the electrolysis method is used to obtain pure elements from their respective compound.

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it is over 32 degrees Fahrenheit (freezing), and below 120 degrees Fahrenheit (boiling)

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What are the hypotheses on which Dalton's atomic theory is based?
worty [1.4K]

Answer:

 Dalton's theory are based on the two laws  that are: Law of conservation of mass and law of constant composition. This theory basically described their properties of atoms.

This theory state that all the atoms are made up of matter which are invisible and in the elements all the atoms are identical in mass and properties.

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3 years ago
1. If a solution of sodium chloride has 22.3 g of
lina2011 [118]

<u>We are given:</u>

Mass of NaCl in the given solution = 22.3 grams

Volume of the given solution = 2 L

<u></u>

<u>Number of Moles of NaCl:</u>

We know that the number of moles = Given mass / Molar mass

Number of moles = 22.3 / 58.44 = 0.382 moles

<u></u>

<u>Molarity of NaCl in the Given solution:</u>

We know that Molarity of a solution = Moles of Solute / Volume of Solution(in L)

Molarity = 0.382 / 2

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7 0
3 years ago
Use the pop-up menus to label the following statements as either True or False. Only the methyl ester of aspartame is sweet. Tru
pickupchik [31]

Answer:

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  • Amide bonds can be hydrolyzed under only acidic conditions. False
  • The zwitterionic form of the amide bond is the most favored resonance form. True
  • The phosphoric acid in soda hydrolyses the aspartame ester making it sweet. False

Explanation:

  • Aspartame is obtained by combining phenylalanine and aspartic acid. Its main impurity is dicetopiperazine, which does not possess sweetening properties.
  • Amide bonds can be hydrolyzed both under basic and acidic conditions.
  • The zwitterionic form of the amide bond is the most favored resonance form. A zwitterion is an electrically neutral chemical compound, but it has formal positive and negative charges on different atoms, presenting high stability
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Read more on Brainly.com - brainly.com/question/15944032#readmore

5 0
4 years ago
How many joules of heat energy are absorbed when 50.0 grams of water are heated from 50.0°C to 60.0°C?
Ivahew [28]

<u>Answer:</u>

<em>2090 \ j needed to heat the amount of water giving. </em>

<u>Explanation:</u>

To solve this question we first need to know the specific heat of water which is given by <em>4.18 joules</em> Per gram for increasing <em>1° of  temperature</em>. Now since one gram of water name one joules per gram so 2 grams will need <em>twice of 4.18</em> that is 8.36 similarly 50 grams will need 50 \times 4.18 = 209

Now we need to calculate the heat for 10° of change because temperature rises from 50° centigrade to 60° centigrade and difference in degrees

<em>so heat needed is= 209 \times 10 = 2090 \ j</em>

6 0
3 years ago
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