Calculate the molality 6.75% solution of ethanol in water

1.574

Explanation:

Given that:

Gram of solution = 100 g

Solution = solute + solvent

Solute = 6.75% = (6.75 / 100) * 100 = 6.75 g (Ethanol) (C2H5OH)

Solvent = 100 - 6.75 = 93.25 g

Recall :

Molality = (mol of solute / kg of solvent)

Mole of solute = gram / molar mass

Molar mass of C2H5OH = (12 * 2) + (1 * 5) + 16 + 1 = 46g/mol

Mole = 6.75g / 46g/mol

Mole = 0.1467391

93.25 g to kg

1000 g = 1 kg

93.25 g = 93.25 / 1000 = 0.09325

Hence,

Molality = 0.1467391 / 0.09325

= 1.5736096

= 1.574

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.