Question

В стакан налили 180 г воды. Сколько молекул воды в стакане? Сколько это молей H2O?

Answer 1

10 моль = = 6*10 в 24 степени молекул
еще 20г спирта долей, выпей и посчитаешь

Answer 2

Calculation of the Number of Water Molecules in the Glass

To calculate the number of water molecules in the glass, we need to use Avogadro's number and the molar mass of water.

Avogadro's number (Na) is approximately 6.02 x 10^23 molecules per mole.

The molar mass of water (H2O) is approximately 18 grams per mole.

Given that the glass contains 180 grams of water, we can calculate the number of moles of water using the formula:

moles = mass / molar mass

Substituting the values, we have:

moles = 180 g / 18 g/mol = 10 moles

Since 1 mole of any substance contains Avogadro's number of molecules, we can calculate the number of water molecules in the glass by multiplying the number of moles by Avogadro's number:

number of water molecules = moles x Avogadro's number

Substituting the values, we have:

number of water molecules = 10 moles x 6.02 x 10^23 molecules/mole = 6.02 x 10^24 molecules

Therefore, there are approximately 6.02 x 10^24 water molecules in the glass.

Calculation of the Number of Moles of H2O

To calculate the number of moles of H2O in the glass, we divide the mass of water by the molar mass of water.

Given that the glass contains 180 grams of water and the molar mass of water is 18 grams per mole, we can calculate the number of moles using the formula:

moles = mass / molar mass

Substituting the values, we have:

moles = 180 g / 18 g/mol = 10 moles

Therefore, there are approximately 10 moles of H2O in the glass.

Please note that the calculations provided are based on the assumption that the water in the glass is pure H2O and does not contain any impurities or dissolved substances.

I hope this helps! Let me know if you have any further questions.