In the SI system of units, the mole is one of seven base units. It is frequently used in chemical calculations. However, a mole
1 answer:
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Answer:
167.980.
Explanation:
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In this case, since additions involving the display of the result with the appropriate number of significant figures involve the solution of the system without looking at them:
Considering that 156.325 is significant to the thousandths and 11.65498 to the hundred thousandths, we infer that the result should be taken to the thousandths as well as 156.325; thus, we obtain:
Because the second decimal nine is rounded to ten and therefore the 7 is taken to 8.
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Answer:
C. 7370 joules.
Explanation:
There is a mistake in the statement. Correct form is described below:
<em>Using the above data table and graph, calculate the total energy in Joules required to raise the temperature of 15 grams of ice at -5.00 °C to water at 35 °C. </em>
The total energy needed to raise the temperature is the combination of latent and sensible heats, all measured in joules, and represented by the following model:
(1)
Where:
- Mass of the sample, in grams.
- Specific heat of ice, in joules per gram-degree Celsius.
- Specific heat of water, in joules per gram-degree Celsius.
- Latent heat of fusion, in joules per gram.
- Initial temperature of the sample, in degrees Celsius.
- Melting point of water, in degrees Celsius.
- Final temperature of water, in degrees Celsius.
- Total energy, in joules.
If we know that ,
,
,
,
,
and
, then the final energy to raise the temperature of the sample is:
Hence, the correct answer is C.