Question

Сколько молекул содержится в 18 граммах воды? срочно пожалуйуста​

Answer 1

Calculating the Number of Molecules in 18 Grams of Water

To calculate the number of molecules in 18 grams of water, we can use the following steps:

1. Determine the Molar Mass of Water: - The molar mass of water (H2O) is approximately 18.01528 grams per mole.

2. Convert Grams to Moles: - We can use the molar mass of water to convert grams to moles using the formula: ``` moles = grams / molar mass ```

3. Calculate the Number of Molecules: - Once we have the number of moles, we can use Avogadro's number to calculate the number of molecules in the given amount of water.

Let's proceed with the calculations.

Calculation

1. Determine the Molar Mass of Water: - The molar mass of water is approximately 18.01528 grams per mole.

2. Convert Grams to Moles: - Using the formula: ``` moles = 18 grams / 18.01528 grams per mole ``` This gives us approximately 0.999 moles of water.

3. Calculate the Number of Molecules: - Avogadro's number is approximately 6.022 x 10^23 molecules per mole. - Therefore, the number of molecules in 18 grams of water is approximately: ``` 0.999 moles * 6.022 x 10^23 molecules/mole ≈ 6.01 x 10^23 molecules ```

Answer

So, there are approximately 6.01 x 10^23 molecules in 18 grams of water.