The specific weight of glycern is 78.6 lb/ft3. compute its density and specific gravitty. what is its specific weight in kn/m3

Explanation:

Specific weight is the amount of weight of substance present in a unit volume of the substance.It is given by :

= density of the substance

g = acceleration due to gravity =

Specific gravity is the dimensionless ratio of the density of the substance to density of water at normal temperature.

We have : Specific weight of glycerin:

1 lb = 0.4536 kg

1 foot = 0.3048 m

Density of glycerine =

The density of the glycerin is .

The specific gravity of glycerin =

Density of water =

Density of glycerine =

The specific gravity of glycerin is 0.128.

1 lb = 4.45 N

1 foot = 0.3048 m

Specific weight of glycerin is .

tracks, burrows, eggshells, nests, tooth marks, or gastroliths

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.