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Hatshy [7]
4 years ago
6

A. When 25.4 and 40.433 are added, the answer should be based on how significant figures or decimal

Chemistry
1 answer:
vladimir2022 [97]4 years ago
3 0

Answer:

65.8 and it is shown considering the significant figures of the shortest number.

Explanation:

Hello,

In this case, when we add 25.4 and 40.433 the result is 65.833, nevertheless, the result is shown based on the initial number having the fewest amount of significant figures that in this case is 25.4 that has three, therefore, the result must be 65.8 and it is shown considering the significant figures of the shortest.

Regards.

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the specific heat of the metallic element rhodium is 0.240 j/g-k at 25°c. if 586 j of heat is added to an 80.0 g block of rhodiu
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The expected final temperature of the block, given that 586 J of heat were added to it is 55.5 °C

<h3>How to determine the final temeprature</h3>

We'll begin by obtaining the change in the temperature of the block. This can be obtained as follow:

  • Specific heat capacity of block (C) = 0.240 J/gºC
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Divide both sides by MC

ΔT = Q / MC

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Finally, we shall determine the final temperature of the block. This can be obtained as follow:

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  • Change in temperature (ΔT) = 30.5 °C
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ΔT = T₂ – T₁

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Collect like terms

T₂ = 30.5 + 25

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Thus, from the calculation made above, we can conclude that the final temperature is 55.5 °C

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This implies that the general fomula of the amine group ought to be R2NH. This is because, the two hydrogen atoms of ammonia have been substituted by alkyl groups.

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