1. Consider the following reaction: 4 Na + O2 -> 2 Na2O a.How many moles of O2 a

Question

1. Consider the following reaction: 4 Na + O2 -> 2 Na2O a.How many moles of O2 are needed to react with 6.0 mol Na? b. How many g of O2 are needed to react with 16.5 g Na? c. How many g of Na are needed to produce 11.5 g of Na2O?

2.Consider the following reaction:? C6H6?+?Br2?->??C6H5Br?+?HBr? (is it balanced?)? a.?What is? the? theoretical? yield ?of? C6H5Br ?in ?this?reaction? when ?30.0?g? of? C6H6 ?reacts? with? 65.0?g? of ?Br2?? ? ? ? ? ? ? ? ? ? b.?If? The? actual? yield ?of? C6H5Br ?was ?56.7?g,?what?is? the ?percent? yield??

1. Consider the following reaction: 4 Na + O2 -> 2 Na2O a.How many moles of O2 are needed to react with 6.0 mol Na? b. How many g of O2 are needed to react with 16.5 g Na? c. How many g of Na are needed to produce 11.5 g of Na2O?

2.Consider the following reaction:? C6H6?+?Br2?->??C6H5Br?+?HBr? (is it balanced?)? a.?What is? the? theoretical? yield ?of? C6H5Br ?in ?this?reaction? when ?30.0?g? of? C6H6 ?reacts? with? 65.0?g? of ?Br2?? ? ? ? ? ? ? ? ? ? b.?If? The? actual? yield ?of? C6H5Br ?was ?56.7?g,?what?is? the ?percent? yield??

1. Consider the following reaction: 4 Na + O2 -> 2 Na2O a.How many moles of O2 are needed to react with 6.0 mol Na? b. How many g of O2 are needed to react with 16.5 g Na? c. How many g of Na are needed to produce 11.5 g of Na2O?

2.Consider the following reaction:? C6H6?+?Br2?->??C6H5Br?+?HBr? (is it balanced?)? a.?What is? the? theoretical? yield ?of? C6H5Br ?in ?this?reaction? when ?30.0?g? of? C6H6 ?reacts? with? 65.0?g? of ?Br2?? ? ? ? ? ? ? ? ? ? b.?If? The? actual? yield ?of? C6H5Br ?was ?56.7?g,?what?is? the ?percent? yield?? 2.Consider the following reaction:? C6H6?+?Br2?->??C6H5Br?+?HBr? (is it balanced?)? a.?What is? the? theoretical? yield ?of? C6H5Br ?in ?this?reaction? when ?30.0?g? of? C6H6 ?reacts? with? 65.0?g? of ?Br2?? ? ? ? ? ? ? ? ? ? b.?If? The? actual? yield ?of? C6H5Br ?was ?56.7?g,?what?is? the ?percent? yield??

Explanation / Answer

Basic thing we have know is

Mass balance or moles balance.

4 moles of Na react 1 mole of O2 gives 2 moles of 2Na2O

6 mols needs ?moles O2

6*1/(4)=1.5moles

2)mol = weight/molecular weight

Na mol weight is 23

Mol O2 is 32

Given that 16.5 grams means .5 mol

4 mol react 1 O2 mol

.5 moles react with O2?

.125 mol O2

In grams .125*32 = 4grams O2

Na2O molecular weight is 62

11.5 grams means .2 moles

4 moles of Na gives 2 moles na2o

? Of Na required for .2 mole na2o

.4 moles of Na

.4*23

9.2 grams

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