students were given a solution of Na2Co3 containing 1.33grams of Na2Co3 dissolve in 250cm cube of water. The base solution was titrated against the acid HCl using methyl orange as an indicator. If the volume of the acid during titration is 31.3cm cube and the volume of the base is 25cm cube. Find the molarity of the acid in mole per dm cube and the concentration of the acid in gram per dm cube​

- 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

you need to have a picture of the atom that way we can answer it