___Li + ___AlPO4 --> ___Al + ___Li3PO4

If 14.5 grams of Lithium are reacted, how many moles of Aluminum are produced?

From 14.5 g of Li 0.7 moles of Al are produced.

Explanation:

Given data:

Moles of Li = 14.5 g

Moles of Al produced = ?

Solution:

Chemical equation:

3Li + AlPO₄   →    Al + Li₃PO₄

Number of moles of Li:

Number of moles = mass/ molar mass

Number of moles = 14.5 g/6.94 g/mol

Number of moles = 2.1

Now we will compare the moles of Al and Li from balance chemical equation.

                       Li         :         Al

                        3        :          1

                      2.1        :        1/3 ×2.1 = 0.7 mol

So from 14.5 g of Li 0.7 moles of Al are produced.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.