Consider the following chemical equation. how many moles of seo3 can be produced from 35
g of oxygen and excess selenium?
25e +302 - 25e03

35 g of Oxygen will give 59.7 g of SeO3

Explanation:

Atomic number of SeO3 = 34 + 3×16 =  82 g

In this reaction 3 moles of oxygen gives 2 moles of SeO3

therefore one mole of oxygen will give moles of SeO3

that is 32 g of oxygen will give g of SeO3

therefore 35 g of oxygen will give g of SeO3

=59.7 g of SeO3

- 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