During diffusion substances move from the denser medium (meaning where there is more of the substance) to less dense medium (meaning where there is less of the substance).
Which of the following is a unit of volume in the metric system? (5 points)
1 answer:
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Answer: There are atoms in 24 moles of Fe.
Explanation:
According to the mole concept, 1 mole of a substance contains atoms.
Therefore, atoms present in 24 moles of Fe are calculated as follows.
Thus, we can conclude that there are atoms in 24 moles of Fe.
Answer:
1.2 × 10⁴ cal
Explanation:
Given data
- Mass of water (m): 300 g
- Initial temperature: 80 °C
- Final temperature: 40°C
We can calculate the heat released by the water () when it cools using the following expression.
where
c is the specific heat capacity of water (1 cal/g.°C)
According to the law of conservation of energy, the sum of the heat released by the water () and the heat absorbed by the reaction (
) is zero.