Be sure to answer all parts. An empty Erlenmeyer flask weighs 219.5 g. When filled with water (d = 1.00 g/cm^3), the flask and its

contents weigh 648.5 g.

(a) What is the volume of water in the flask? Enter your answer in scientific notation.

x 10___cm^3

(b) How much does the flask weigh when filled with the same volume of chloroform (d = 1.48 g/cm^3)? ___g

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.

i believe that it is a exoplanet

what is the question here. i think you messed up.