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Andrei [34K]
2 years ago
12

How many elements are in the mixture pictured? A. 7 B. 4 C. 3 D. 2

Physics
1 answer:
alex41 [277]2 years ago
5 0

Answer:

C: 3

Explanation:

Cause of the colors

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Question 4 (5 points)
dybincka [34]

Answer:

CₙH₂ₙ

Explanation:

Alkenes have at least one double bond between 2 of the parent chain carbons. If the general formula for alkanes (no double bonds) is CₙH₂ₙ₊₂, it makes sense that the general formula for alkenes is CₙH₂ₙ. This means that alkenes have 2 less hydrogens than their alkane counterparts.

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1 year ago
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Examples of Newton's third law of motion are ubiquitous in everyday life. For example, when you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air. Engineers apply Newton's third law when designing rockets and other projectile devices.

3 0
3 years ago
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If the heat of fusion is 32.2 kj/mol, the amount of heat energy required to melt 5.67 grams of feo is
anzhelika [568]
The heat of fusion is the amount of energy required to change the state of one mole of substance from solid to liquid at constant temperature. Therefore, in order to determine the energy needed by a given mass of substance, we must first convert the mass into moles by using:
Moles = mass / Mr
Moles = 5.67 / 71.84
Moles = 0.079 mol

Energy = latent heat of fusion * moles
Energy = 32.2 * 0.079
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3 0
3 years ago
Why do many people view controls negatively?
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Many People<span> Are Averse to Management "</span>Control<span>" ... and then subsequent decisions about what to </span>do<span> is the essence of management coordination</span>
5 0
3 years ago
A car traveled 140 km in 2.5 hours. What was its average speed in km per hour?
Vilka [71]
<h3>formula of speed is distance/time</h3><h3>so</h3><h2>140/2.5</h2><h2>= 56</h2><h2>the answer should be </h2><h2>56 km/h</h2>

5 0
2 years ago
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