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ololo11 [35]
2 years ago
14

Draw the dot structure of CX4

Chemistry
1 answer:
hichkok12 [17]2 years ago
7 0

Refer to the attachment

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a spherical sample has a mass of 2.813g. it has a diameter of 8.0mm. what is the sphere made of (determined by its density as g/
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To determine the density, we use the following formula:

density= \frac{mass}{volume}

mass= 2.813 grams
volume= ?

we need to first calculate the volume before we can solve for the density. since the question states that the sample has a spherical shape, we can use the volume formula of spheres to find it.

Sphere_{volume}= \frac{4}{3} \pi r^{3}

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V= \frac{4}{3} \pi 4^{3} = 268 mm^3

we need to change the mm^3 to cm^3 using the following conversion

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268 mm^3 (\frac{1 cm}{10 mm} )^3 = 0.268 cm^3

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3 years ago
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When is heat exchanged during the refrigeration cycle? During the initial condensation and final expansion of the refrigerant. D
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Answer:

During the pumping of hot air into the expansion valve.

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