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adoni [48]
2 years ago
15

Is obsidian a rock? Does it contain minerals? Help please!!

Chemistry
2 answers:
Snezhnost [94]2 years ago
5 0

Answer:

Yes It Is A Rock

Explanation:

It Is Not A True Mineral

Aloiza [94]2 years ago
3 0

Answer:Obsidian is a rock and it does include minerals.

Explanation:

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Why is there a change in energy during chemical reactions?(1 point)
Firdavs [7]

Energy is released by the formation of chemical bonds, and energy is

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<h3>What is a chemical reaction?</h3>

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Energy is released by the formation of chemical bonds and this type of

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Function of starch solution​
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how does the processes of photosynthesis and cellular respiration allow for the flow of energy in organisms
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Photosynthesis and cellular respiration go hand and hand. Remember the two equations are just a reverse of the opposite equation. 

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When a plant goes through photosynthesis it produces oxygen as a waste product, which you should know is what animals use to breathe, well when animals use oxygen in the process, they also make a waste product which happens to be Carbon Dioxide, which a plant uses to make glucose during photosynthesis, so if we didin't have one we wouldn't have the other.
8 0
3 years ago
The theoretical yield of Cl2 from certain starting amounts of MnO2 and HCl was calculated as 60.25 g and 65.02 g, respectively.
user100 [1]

Answer:

c    43.38 g

Explanation:

The reaction  between MnO2 and HCl can be represented by the following balanced equation:

MnO2 + HCl ---> Cl2 + MnCl2 + H2O

From the balanced equation, the theoretically required molar ratio of MnO2 to HCl is 1:1, therefore the yields would have been expected to be equal.  

For the fact that HCl  gives a higher yield (65.02g) than MnO2 (60.25g) according to the problem statement, HCl should be in excess,  while the limiting reagent should be MnO2 .  

Thus, the theoretical yield of Cl2 will be  60.25 g.

By definition, the percentage yield is given by

% Yield = (Actual Yield) / (Theoretical Yield),  

This can be simplified to

Actual Yield = % Yield * Theoretical Yield

Plugging in the given values we have

Actual Yield = 72% *  60.25 = 43.38 g

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3 years ago
What happens to particles during<br> changes of state between solids,<br> liquids, and gases?
oksano4ka [1.4K]
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