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pickupchik [31]
3 years ago
14

Compare and contrast of cotton balls and pine cone

Chemistry
1 answer:
Alex3 years ago
3 0
<span>Cotton balls and pine cones are similar in that they both grow on plants and they contain the seeds of that plant. However, that is where the similarities end. By sight and feel alone, cotton balls and pine cones are vastly different. Cotton balls are soft and light, while pine cones have the potential to be a little dry and pri.ckly and have a bit of heft to them.</span>
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How many kilojoules are needed to raise the temperature of 234 g of water from 19.8 C to 33.1 C?
xenn [34]

Answer:

13 kJ

Explanation:

Use the following formula where Q is the Joules needed, m is the mass of the substance, c is the heat capacity, and ΔT is the change in temperature.

Q = mcΔT

The heat capacity of water is 4.186 J/g°C.  The mass of water is 234 g.  The change in temperature is 13.3°C.

Q = mcΔT

Q = (234 g)(4.186 J/g°C)(13.3°C)

Q = 13,027 J

Since the answer is in Joules, convert to kiloJoules.

13,027 J  =  13.027 kJ  ≈  13 kJ

5 0
4 years ago
What is the oxidation number of cl in naclo3
kondaur [170]
Let the unknow oxidation number b x
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8 0
3 years ago
Review the equation below. 2KClO3 mc012-1.jpg 2KCl + 3O2 How many moles of oxygen are produced when 2 mol of potassium chlorate
Vlada [557]
Stoichiometry <span>of the reaction:

</span><span>2 KClO</span>₃<span>    =    2 KCl  +   3 O</span>₂
  ↓                                      ↓
    
2 mole KClO₃ ----------> 3 mole O₂
2 mole KClO₃ ----------> ?

KClO₃ = 2 * 3 / 2

KClO₃ = 6 / 2

= 3 moles de KClO₃

hope this helps!
4 0
4 years ago
Read 2 more answers
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Alex787 [66]

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Explanation: Don’t try it.

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2 years ago
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