Compare and contrast the combustion of methane and the combustion of hydrogen in 2-3 complete sentences.

Answer :

Combustion reaction : The combustion means burning. It is defined as the reaction in which a hydrocarbon react with oxygen in the presence of air to give carbon dioxide and water vapor as a product.

The combustion of methane gives carbon dioxide and water vapor as a product but the combustion of hydrogen gives water vapor as a product.

The balanced combustion reaction of methane will be:

The balanced combustion reaction of hydrogen will be:

- 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