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muminat
3 years ago
8

What are four signs a chemical reaction has taken place?

Chemistry
1 answer:
RoseWind [281]3 years ago
6 0

1. Change in temperature

2. Gas given off (bubbles)

3. Color change

4. Salts made

Happy to help! Please mark as Brainliest!

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The grand canyon is in the northwest part of arizona what large river passes through it. What is the large river that passes thr
daser333 [38]

Answer:

Colorado river

Explanation:

The Grand Canyon is usually referred to as the large and beautiful geological landform that is formed by the continuous carving of the rocks due to the flow of the Colorado River through the canyon. It is near about 450 kilometers long and has a width of about 6.5 to 30 kilometers. This canyon covers a large area in the north-western part of Arizona in the United States.

The main agent for the cutting down of rocks here is the water. According to the research, this canyon is about 70 million years old, and the river Colorado has been flowing through this canyon from about 5-6 million years back.

8 0
4 years ago
Select the correct answer.
Sladkaya [172]

Answer:

  • <u><em>Option D. There will be a shift toward the reactants.</em></u>

Explanation:

The reaction is:

       PCl_5(g)+heat\rightleftharpoons PCl_3(g)+Cl_2(g)

The application of LeChatelier's principle leads to consider the <em>heat</em> as a <em>reactant</em> or a product depending on if it is on the left side or the right side.

In this reaction, the <em>heat</em> is on the left side, thus it must be considered a <em>reactant</em>.

Decreasing the temperature is equivalent to remove or consume heat. Thus, the reaction must shif to the left to compensate that reduction of heat. That is the reverse reaction shall be favored.

In conclusion, <em>there will be a shift toward the reactants.</em>

5 0
3 years ago
A student performs an exothermic reaction in a beaker and measures the temperature. If the thermometer initially reads 35 degree
Ksju [112]

Answer:

C

Explanation:

Exothermic means that heat is released from the reaction

7 0
2 years ago
Which will be true for any actual or potential nucleophilic substitution reaction?
Anni [7]
<span>Answer: The rate equation for a nucleophilic substitution reaction of a tertiary reagent.</span>
8 0
4 years ago
Which set of elements would be likely to share similar properties?
Rasek [7]

Answer: the answer would be H,he,Li.

Explanation: I hope that helped!

8 0
3 years ago
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