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katovenus [111]
3 years ago
14

What do all of these molecules have in common?

Chemistry
2 answers:
Leni [432]3 years ago
8 0
The answer is B) they store energy.
The answer isn't C because there are also molecules in water. The answer isn't D because molecules are not ONLY found in living things, in fact they are found in everything.
kherson [118]3 years ago
5 0
B they store energy.
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What is the mass percentage of O in C₂H₄O₂? Provide an answer to two decimal places.
nasty-shy [4]

Answer:

53.29%

Explanation:

The molar mass of C2H4O2 is 60.05g and the 2 O's are 32.00g

so 32.00/60.05= 0.53288925895

and that as a decimal rounded to the nearest hundredths is 53.29%

6 0
2 years ago
6. A solution of CuSO4 is electrolyzed for 10 minutes with a current of 1.5 amperes. What is the mass of copper deposited at the
vladimir2022 [97]

The mass of Copper deposited at the cathode : 0.296 g

<h3>Further explanation</h3>

Given

time = t = 10 min=600 s

current = i = 1.5 A

F = 96500 C

charge Cu=+2

Required

The mass of Copper

Solution

Faraday's Law

\tt W=\dfrac{e.i.t}{96500}

e = Ar/valence(valence Cu=2, Ar=63.5 g/mol)

Input the value :

\tt W=\dfrac{63.5/2\times 1.5\times 600}{96500}\\\\W=0.296~g

5 0
3 years ago
State three natural conditions under which plasmolysis could occur
S_A_V [24]

Answer:

  1. When the cell is placed in salt solution
  2. When leave celss dry
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Explanation:

Hope this helps

4 0
3 years ago
Which is not true about the upper paleolithic period?.
jok3333 [9.3K]

Answer:The Upper Paleolithic period started about 40,000 years BC and ended about 10,000 years BC. So it took place between 40,000 and 10,000 BC. After that started the Mesolithic Era ( 10,000 to 4,000 BC ). Stone tools in the Upper Paleolithic period were primarly blade-based technology. Also this period is well known for the cave art and paintings of animals. Answer: C ) The period took place between 40,000 and 4,000 BC ( not true ).

Explanation:

5 0
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Which material has a density most similar to the density of water?
konstantin123 [22]

Answer:

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Explanation:

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8 0
3 years ago
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