Wine is approximately 12% ethanol (CH3CH2OH) by volume. Ethanol has a molar mass of 46.06 g/mol and a density 0.789 g/mL. How many moles of ethanol are present in a 750-mL bottle of wine?

1.54 moles of pure ethanol are present in 750mL of wine

Explanation:

The sort of concentration 12% by volume, means that in 100 mL of solution (wine) 12 mL are pure ethanol

We use the density of pure ethanol to determine the mass:

Ethanol density = Ethanol mass / Ethanol volume

Ethanol density . Ethanol volume = Ethanol mass

0.789 g/mL . 12 mL = 9.47 g of ethanol

Now we can determine the moles: 9.47 g . 1 mol / 46.06 g = 0.205 moles

Now we can make a rule of three:

In 100 mL of solution (wine) we have 0.205 moles of pure ethanol

Then, in 750 mL of solution we may have (750 mL . 0.205) / 100 = 1.54 moles

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.