Four consecutive absorption lines in the pure rotational spectrum of gaseous 1h35cl are found to have the frequen- cies 2.50 × 1012, 3.12 × 1012, 3.74 × 1012, and 4.37 × 1012 s21.

calculate:

(a) the moment of inertia i of hcl (in kg m2)

(b) the energies of the j 5 1, j 5 2, and j 5 3 rotational levels of hcl, measured from the j 5 0 state (in joules)

(c) the hucl bond length (in angstroms)

(d) the initial and final j states for the observed absorp- tion lines

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

answer: i dont know the answer but this might

explanation:

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a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.