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neonofarm [45]
3 years ago
5

Part B Compute 1240.64/64. Round the answer appropriately Express your answer numerically using the proper number of significant

figures. View Available Hint(s) Submit
Chemistry
1 answer:
BARSIC [14]3 years ago
4 0

Answer:

19

Explanation:

1240.64/64

This is a simple division that can easily be evaluated using any form of calculator.

Here, the main challenge is in expressing the answer in the proper number of significant figure.

The approach here is to express the answer to the which is least precise. This is usually the number with the lower significant values.

Here, 64 has two significant figures and it is of a lower rank. Our answer should be expressed this way:

      \frac{1240.64}{64} = 19.385 = 19

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Knowing whether q is endothermic or exothermic allows one to characterise the relationship between q and H. An endothermic reaction is one that absorbs heat and demonstrates that heat from the environment is used in the reaction, hence q>0 (positive). For the aforementioned equation, under constant pressure and temperature, if q is positive, then H will also be positive. In a similar manner, heat is transferred to the environment when it is released during an exothermic reaction. Thus, q=0 (negative). Therefore, if q is negative, H will also be negative.

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