Question

За 1 сутки из стакана полностью испарилось 10 г воды. Сколько в среднем молекул вылетало с поверхности аоды за время, равное 1 ч?

Answer 1

Ответ :2,4 молекул за 1 час

Answer 2

Calculating the Number of Water Molecules Evaporated

To calculate the number of water molecules that evaporated from the surface of the water, we can use the following steps:

1. Calculate the Number of Moles of Water Evaporated: - Given that 10 g of water evaporated in 1 day, we can calculate the number of moles of water using the molar mass of water, which is approximately 18 g/mol.

- The formula to calculate the number of moles is: \[ \text{moles} = \frac{\text{mass}}{\text{molar mass}} \] where mass is the mass of water evaporated and molar mass is the molar mass of water.

- Substituting the given values: \[ \text{moles} = \frac{10 \, \text{g}}{18 \, \text{g/mol}} = \frac{10}{18} \, \text{mol} \]

2. Calculate the Number of Molecules: - Once we have the number of moles, we can use Avogadro's number to calculate the number of molecules.

- Avogadro's number is approximately \(6.022 \times 10^{23}\) molecules/mol.

- The formula to calculate the number of molecules is: \[ \text{number of molecules} = \text{moles} \times \text{Avogadro's number} \]

- Substituting the given values: \[ \text{number of molecules} = \frac{10}{18} \, \text{mol} \times 6.022 \times 10^{23} \, \text{molecules/mol} \]

Conclusion

The number of water molecules that evaporated from the surface of the water in 1 day can be calculated using the above steps.