Consider the balanced chemical reaction below and determine the percent yield for sodium bromide if 3.87 moles of iron(III) bromide yielded 10.4 moles of sodium bromide. 2FeBr3 + 3Na2S → Fe2S3 + 6NaBr

- 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

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

6.4 cm (max) - 25 cm (min)