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zepelin [54]
3 years ago
8

Which statement is true? a. Energy is capability of doing work b. A cup of water has kinetic energy c. Kinetic energy is stored

energy in substances. d. Potential energy is enery in motion. e. Heat and electricity are different forms of energy
Chemistry
1 answer:
MakcuM [25]3 years ago
7 0

Answer:

Option A an E.

Explanation:

Energy can be described as the capability to do work. It is what has to be transferred to an object in order to get this object to do work. Energy can be in various forms such as heat energy, kinetic, potential, electrical, chemical, nuclear etc.

It takes energy to do quite a number of things, from cooking food to driving and also in engaging in exercises.

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Calculate the number of moles of C2H6 in 6.29×1023 molecules of C2H6.
Kipish [7]

1.05moles

Explanation:

Given parameters:

Number of molecules of C₂H₆ = 6.29 x 10²³molecules

Unknown:

Number of moles = ?

Solution:

The mole is the amount of substances that contains Avogadro's number of particles i.e 6.02 x 10²³

 To find the number of moles:

  number of moles = \frac{number of particles}{Avogadro's number}

  number of moles = \frac{6.29 x 10^{23} }{6.02 x 10^{23} }

  number of moles = 1.05moles

Learn more:

moles brainly.com/question/1841136

#learnwithBrainly

7 0
3 years ago
Use your calculator to determine the answer to the following calculation:<br> 1.0×10^−15/4.2×10^−7
lianna [129]
1.0×10^−15/4.2×10^−7=<span>2.3809524e-23 Hoped I helped!</span>
8 0
3 years ago
What is the molarity of a kf(Aq) solution containing 116 g of kf in 1.00 l of solution
Oduvanchick [21]

Answer:

2.00 M

Explanation:

K=39 F=19

39+19=58

116/58= 2 mol/ 1 L = 2 M

8 0
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NEED HELP ASAP!!! What is the density of each of the following gases at STP? Show your work.
BaLLatris [955]

Answer:

A. 1.63g/dm^3 (3 s.f.)

B. 0.833g/dm^3 (3 s.f.)

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Explanation:

Please see attached picture for full solution.

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A rock is made of the same substance while a mineral is made up of different type of
Nikitich [7]

Answer:

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