Answer:
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
We have the final answer as
Hope this helps you
(2) 45 K (4) 45°C
The iron bar at 325 K will gain energy from the water if the water temperature is higher, which is the case when it is 65°C (338 K). The bar would lose energy to the other given temperatures (45 K, 65 K, 45°C).
The transfer of thermal energy, or heat, is from a body at higher temperature to a body at lower temperature. The iron bar in your question is at 325 K. The temperatures of the water samples are closer to room temperature (around 293 K) when expressed in Kelvin. Therefore, the iron bar will gain energy from the water if the temperature of the water is 65°C (338 K), as it is the only option above the temperature of the iron bar. It would lose energy to the other options (45 K, 65 K, 45°C).
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