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baherus [9]
3 years ago
15

Why is it that 85.48 rounded to two significant figures is 85 and not 86?

Chemistry
1 answer:
Gelneren [198K]3 years ago
8 0

Answer:

See below.

Explanation:

That is because  of the .48.

85.48 is closer to 85 than 86.

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How much heat (in Joules) is needed to raise the temperature of 257g of ethanol (cethanol=2.4 J/g°C) by 49.1°C?
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Answer:

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Explanation:

Given data:

Mass of ethanol = 257 g

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Solution:

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It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

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Now we will put the values in formula.

Q = 257 g× 2.4 j/g.°C × 49.1 °C

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