A60-gram sample of licl · h 2 o is heated in an open crucible until all of the water was driven off. what is the total mass of licl remaining in the crucible

42.11 g

Explanation:

Mass of the hydrated salt = 60 g

The moles of the hydrated salt is :

Amount = 60 g

Molar mass of = 60.4093 g/mol

The formula for the calculation of moles is shown below:

Thus, moles are:

After heating only LiCl remains in the crucible. So,

Moles of LiCl = 0.9932 moles

Molar mass of = 42.394 g/mol

The formula for the calculation of moles is shown below:

Also, mass is

Total mass of LiCl remaining in the crucible = 42.11 g

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.