a gallon of paint. covers an average of 20.0m^2 of surface. The paint costs $10.00 per gallon. What is the cost of the paint needed to cover a surface that is 108.0ft long by 10.0ft wide?

60 dollars.-

Explanation:

1 meter = 3.28 feet

1 square meter = 3.28^2 feet^2

1 square meter = 10.7584 square feet.

20 square meters = 10.7584 * 20 = 215.168 square feet.

The area to be painted is 108.0 * 10.0 = 1080 square feet

The number of cans of paint needed = 1080/215.168

The number of cans of paint needed = 5.09 cans

Even with so little above 5, you have to round up. So it is 6 cans of paint needed.

1 can of paint costs 10 dollars.

6 cans of paint costs 6 * 10 = 60 dollars

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.