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mote1985 [20]
3 years ago
13

Where is the energy being transferred from in an endothermic reaction?

Chemistry
1 answer:
Alisiya [41]3 years ago
3 0
In an endothermic reaction, the heat in going in. it absorbs energy from its surroundings.

hope this helps!
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Which of the following is not equal to 0.536 kilometers?
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Read 2 more answers
Fluorine-21 has a half life of approximately 5 seconds. You have 340 grams, what fraction of the original nuclei would remain af
madreJ [45]
The half life equation is -->P(t) = Pi (0.5) ^ (t/c)
c is equal to the element to reach its half-life (5 seconds)t is equal to the duration of time the element is expose to (20 seconds)Pi is the initial amount (340)0.5 is the base of this exponential function to represent half-life.P(t) is the expression for the function of time

P(20) = 340 (0.5)^20/5P(20) = 340 (0.5) ^4P(20)= 21.25 grams
Fraction = P(t)/Pi              = P(20)/Pi              =21.25/340              =1/16
Therefore, when given 20 seconds, 340 grams of Fluorine-21 will degrade to 21.25 grams OR 1/16 of its original mass.
Hope this method helps! (This is my answer btw, I think you may have accidentally posted twice?)
7 0
3 years ago
Help me balence: ___ H2 + ___ O2----> _____ H20
luda_lava [24]

Explanation:

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its yr balanced equation.

hope it helps

<h2>stay safe healthy and happy....</h2>
6 0
3 years ago
If told to determine whether or an unknown substance is either salt or sugar what do you do to determine which it is explain?
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