You need 150g of pure lithium for an experiment you're doing. You have 675g of lithium oxide (Li2O). Can you extract all the lithium you need from the amount of compound you have? Show your reasoning.

Yes, you can extract all the lithium you need from the compound

We'll begin by calculating the mass of lithium, Li in 1 mole of Li₂O. This can be obtained as described below:

1 mole of Li₂O = (2×7) + 16

1 mole of Li₂O = 14 + 16 = 30 g

SUMMARY

30 g of Li₂O contains 14 g of Li.

30 g of Li₂O contains 14 g of Li.

Therefore,

675 g of Li₂O Will contain = (675 × 14)/30 = 315 g of Li.

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Yes we can extract all the lithium from the amount of compound we have.

Explanation:

To calculate the moles :

According to stoichiometry :

2 moles of produce 4 moles of

Thus 22.5 moles of will produce=  of Li

As 21.4 moles is a lesser quantity than 45 moles, thus it can be produced