What mass of oxygen is required to produce 8.0g of magnesium oxide from 4.8g if magnesium

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3.2 grams

Explanation:-

The chemical formula for Magnesium Oxide is MgO.

The balanced chemical equation for this reaction is

2Mg + O2 --> 2MgO

Atomic weight of Mg = 24 grams

Molecular weight of oxygen gas O2 = 16 x 2 = 32 grams.

Molecular weight of MgO = 24 x 1 + 16 x 1 = 40 grams

From the balanced chemical equation we see

To produce 2 MgO we require 1 O2.

∴ To produce 2 x 40 grams of MgO we require 32 grams of Oxygen.

To produce 8 grams of MgO we require 32 x 8 / ( 2 x 40) grams of oxygen

= 3.2 grams of oxygen

- 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

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2