The freezing point of helium is –270°c. the freezing point of xenon is –112°c. both of these are in the noble gas family. which of the following statements is supported by these data?

a)helium and xenon form highly polar molecules.
b)as the molecular weight of the noble gas increases, the freezing point decreases.
c)the london dispersion forces between the helium molecules are greater than the london dispersion between the xenon molecules.
d)the london dispersion forces between the helium molecules are less than the london dispersion forces between the xenon molecules.
e)none of these.

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Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl +4h2o enter the elemental symbol. view available hint(s) is reduced

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution