Aluminum metal reacts with chlorine gas to form aluminum chloride. The reaction can be represented by the following balanced chemical equation: 2 Al(s) + 3 Cl2(g) → 2 AlCl3(s).

If you were trying to react 52.9 grams of chlorine gas completely, how many grams of aluminum would you need?

[grams of Aluminum] Do NOT enter the unit in your answer. Report your answer with 3 SFs.

Given to us is the Reaction of Aluminium metal with Chlorine gas . That is ,

Now Mass of 1 mole aluminium = 27g . So mass of 2 moles of it would be 27×2 g = 54g .

Also , Mass of 1 mole of chlorine gas = 35.5 g . So mass of 2 Atoms will be 71g . And mass of 3 moles of atom will be 71 × 3g = 213g .

Now , use unitary method ;

213 g of Chlorine reacts with 54g of Aluminium.

1 g of Chlorine will react with of Aluminium.

Hence 52.9 g of Chlorine will react with = of Aluminium.

- 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

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.