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4vir4ik [10]
3 years ago
15

Suppose two chemicals are reacted together. It takes 1000 kJ of energy to break the bonds of the reactants and 850 kJ of energy

are released by the formation of the products. What is the change in energy for the reaction?
A) 0kJ
B)150kJ
C)-150kJ
D)850kM
Mathematics
2 answers:
vekshin13 years ago
8 0
The answer will be ( B )



dlinn [17]3 years ago
3 0
B i think is is 150kj
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Using the mean concept, it is found that the value of the number that was removed was of 4.

<h3>What is the mean?</h3>

The mean of a data-set is given by the <u>sum of all observations in the data-set divided by the number of observations</u>.

The mean of five numbers is 8, hence, the sum of the numbers is given by:

S = 5 x 8 = 40.

If one of the five numbers is removed, the mean becomes 9, hence, the sum of the four numbers is given by:

S = 4 x 9 = 36.

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40 - 36 = 4.

Hence, the value of the number that was removed was of 4.

More can be learned about the mean concept at brainly.com/question/25122507

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The sum of a rational number and an irrational number is irrational." By definition, an irrational number in decimal form goes on forever without repeating (a non-repeating, non-terminating decimal). By definition, a rational number in decimal form either terminates or repeats.

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