A student adds solid kcl to water in a flask. The flask is sealed with a stopper and thoroughly shaken until no more solid kcl dissolves. Some solid kcl is still visible in the flask. The solution in the flask is

saturated

Explanation:

Saturated solution is defined as the solution in which no more solute particles can be dissolved in the solvent.

Supersaturated solution is defined as the solution in which more amount of solute particles is present than the solvent particles.

Unsaturated solution is defined as the solution in which more solute particles can be dissolved in the solvent.

As no more solid KCl dissolves and some solid KCl is still visible in the flask, the solution is termed as saturated

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

b.final