Question

V(H2O)=18млn(H2O)=?​

Answer 1

Дано:

V(H2O) = 18 мл

Знайти:

n(H2O) - ?

Розв'язання:

1) m(H2O) = ρ * V = 1 * 18 = 18 г;

2) M(H2O) = 18 г/моль;

3) n(H2O) = m / M = 18 / 18 = 1 моль.

Відповідь: Кількість речовини H2O становить 1 моль.

Answer 2

The information you've provided appears to be related to the volume (V) of water (H2O), which is 18 milliliters (18 mL). However, you seem to be asking for the number of moles (n) of water (H2O), but you haven't provided enough information to calculate it.

To calculate the number of moles of a substance, you need to know the mass of the substance and its molar mass. The formula for calculating the number of moles (n) is:

n = mass (in grams) / molar mass (in g/mol)

To find the number of moles of water (H2O), you would need to know the mass of the water sample in grams and the molar mass of water, which is approximately 18.015 g/mol. Once you have the mass of the water, you can use the formula to calculate the number of moles.

If you provide the mass of the water in grams, I can help you calculate the number of moles.