A5.0 g sample of copper(ll) oxide containing an inert contaminant is analyzed and found to contain 3.0 g copper. using molar masses of 64 g/mol for copper and 16 g/mol for oxygen, which of the following is the percent purity of the copper(ii) oxide sample? elimination tool a 80% 75% c 60% 50%

The percent purity is 75%

Explanation:

To obtain the purity of the copper (II) oxide sample there is necessary to calculate the amount of copper in sample. And then, by stoichiometry, the real amount of CuO.

The amount of copper in sample is:

3,0g × (1 mol Cu / 64 g) = 0,047 mol of Copper ≡ 0,047 mol Copper oxide

The copper moles are the same for CuO.

0,047 mol CuO × ( 80g / 1 mol CuO) = 3,75 g CuO

The real amount of copper (ll) oxide in the sample is 3,75 g.

Thus, the percent purity is:

3,75g of CuO / 5,0g of Sample × 100 = 75%

I hope it helps!

to be fair, you have to have a very high iq to understand rick and morty. the humour is extremely subtle, and without a solid grasp of theoretical physics most of the jokes will go over a typical viewer's head. there's also rick's nihilistic outlook, which is deftly woven into his characterisation- his personal philosophy draws heavily from narodnaya volya literature, for instance. the fans understand this stuff; they have the intellectual capacity to truly appreciate the depths of these jokes, to realise that they're not just funny- they say something deep about life. as a consequence people who dislike rick & morty truly are idiots- of course they wouldn't appreciate, for instance, the humour in rick's existential catchphrase "wubba lubba dub dub," which itself is a cryptic reference to turgenev's russian epic fathers and sons. i'm smirking right now just imagining one of those addlepated simpletons scratching their heads in confusion as dan harmon's genius wit unfolds itself on their television screens. what fools.. how i pity them.

and yes, by the way, i do have a rick & morty tattoo. and no, you cannot see it. it's for the ladies' eyes only- and even then they have to demonstrate that they're within 5 iq points of my own (preferably lower) beforehand. nothin personnel kid