Determine the number of molecules contained in 1 mole of sodium sulfate

                      6.022 × 10²³ Molecules of Na₂SO₄

Explanation:

                    Mole is an amount unit. One mole of any substance contains exactly 6.022 × 10²³ particles which is also called as Avogadro's Number. So in order to calculate the number of molecules contained by 1 mole (incase if the moles given are not 1 then following method is used) of Na₂SO₄, we will use following relation,

          Moles  =  Number of Molecules ÷ 6.022 × 10²³ Molecules.mol⁻¹

Solving for Number of Molecules,

          Number of Molecules  =  Moles × 6.022 × 10²³ Molecules.mol⁻¹

Putting values,

          Number of Molecules  =  1.0 mol × 6.022 × 10²³ Molecules.mol⁻¹

          Number of Molecules  = 6.022 × 10²³ Molecules of Na₂SO₄

Hence,

          There are 6.022 × 10²³ Molecules present in 0.280 moles of Br₂.

- 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

i believe it is a.) released into

explanation: