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Evgesh-ka [11]
3 years ago
6

How many valence electrons does a carbon atom have?

Biology
2 answers:
Kay [80]3 years ago
7 0
A carbon atom has 4 valence electrons
Cerrena [4.2K]3 years ago
3 0
Carbon has 4 valence electrons, which is the reason why it binds easily with so many other elements and compounds.
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List three changes of state during which energy is absorbed.
mote1985 [20]

The three changes of state during which energy is absorbed are:

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2. Change from liquid to gas - Vaporization

3. Change from solid to gas - Sublimation

All these changes of state require heat energy to break the attractive forces that hold the particles of the molecules together, so that they can move into more disorderly states. For instance, when heat is applied to a solid, the solid absorbs the heat and use it to break the attractive forces that are holding the molecules of the solid together. At a particular temperature, the attractive forces will be completely overcome and the solid framework will collapse, thus leading to the melting of the solid.

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What is the cost of electricity if 42000 kWh is used at a rate of $0.04/kWh?
gulaghasi [49]

The cost of the electricity if 42000 kWh of electricity is used is ;  $1680

<h3>Determine the cost of electricity </h3>

<u>Given that ;</u>

value of electricity used = 42000 kWh

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Final step : Determine the total cost of electricty used

unit cost = $0.04/kWh

Totals cost = unit cost * value of electricity used

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Hence we can conclude that The cost of the electricity if 42000 kWh of electricity is used is ;  $1680.

Learn more  about Electricity cost : brainly.com/question/14277272

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