A picture of a patient’s lung showed it to be shriveled and darker than usual.

Chemistry

2 answers:

Strike441 [17]3 years ago

3 0

Answer:

Smoking

Explanation:

It has been proven time and time again to ruin lungs, effectively shortenning ones lifespan.

suter [353]3 years ago

3 0

Explanation:

Smoking, because smoking causes these types of symptoms in long time smokers and people who start to smoke. also I know the answer cause my dad's a nurse.

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A 4.86-gram sample of calcium reacted completely with oxygen to form 6.80 grams of calcium oxide. This reaction is represented b

sesenic [268]

The number of mole of Ca reacted is:
4.86 g Ca/ (40.08 g/mol Ca)= 0.121 mol Ca

Because Ca reacted completely with oxygen and there is 2 mol Ca, there is 1 mol O2 reacted.

Total mass of oxygen that reacted is:
0.121 mol Ca* (1mol O2/ 2 mol Ca)* (32 g O2/ 1 mol O2)= 1.94 g O2 reacted.

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3 years ago

A bike lost 20% of its value after the first year, its value after the first year is $1039. Calculate the original price of the

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Explanation:

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