Question 51 pts aluminum reacts with oxygen to produce aluminum oxide which can be used as an adsorbent, desiccant, or catalyst for organic reactions. a mixture of 82.49 g of aluminum and 117.65 g of oxygen is allowed to react. what is the mass of the excess reactant present in the vessel when the reaction is complete? report your answer to the appropriate number of significant figures.

45 grams

Explanation:

To calculate the moles, we use the equation:

a) moles of

b) moles of

According to stoichiometry :

4 moles of require = 3 moles of

Thus 3.1 moles of will require=  of

Thus is the limiting reagent as it limits the formation of product and is the excess reagent as (3.7-2.3)= 1.4 moles of will remain unreacted.

Mass of

Thus 45 g of will be present in the vessel when the reaction is complete.

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.