What does the "proof" mean on a bottle of liquor? i know that 100 proof liquor is 50% alocohol and 80 proof is 40% and so on. but where does the term "proof" come from and why display it on the bottle? why not just say 50% alcohol etc etc?

The method of changing one or more chemical compounds

The chemical formula for table sugar is C12H11O22. What can you tell from this formula? There are 22 protons in an oxygen atom. There are 12 electrons in a carbon atom. The ratio of oxygen atoms to hydrogen atoms in a molecule of sugar is 2 to 1.

Why do gases have low density

What is true of a solution of 1.0 M HCl (aq) ?

In the formula X2O5, the symbol X could represent an element in Group (1) 1 (3) 15 (2) 2 (4) 18

Select the statements that best describe the properties of an intramolecular sn2 reaction mechanism.

Is a iron nail solid attracted to a magnet and soluble in water

Convert 45.8g of CO2 to mol

Suppose that 0.95 g of water condenses on a 75.0 g block of iron that is initially at 22 °c. if the heat released during condensation is used only to warm the iron block, what is the final temperature (in °c) of the iron block?

How many grams of NaOH are produced with the reaction of 5.00 moles of water?