3 years ago

Help with the correct answer please

1 answer:

6 0

I think the answer is A

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BigorU [14]

I think you add 29.57 + 80 and the answer would be 30.37

5 0

2 years ago

Kaylis [27]

Answer:

Vaccines

Explanation:

3 0

2 years ago

Schach [20]

Answer:

0.02 tons of NO produced when 4 tons of coal is burned

Explanation:

From the given,

Chemical formula of coal = $C_{134}H_{96}O_{9}NS$

Molecular mass of coal = $(134\times12)+(9\times1)+(9\times16)+14+32\,=1906.1gm$

Let’s calculate the mass of nitrogen in coal

$Percentage\,weight\,of\,nitrogen=\frac{Mass\,of\,nitrogen}{Molecular\,mass\,of coal}$

$Percentage\,weight/,of/,nitrogen=\frac{14}{1906.1}=0.73%$

Amount of coal burnt = 4tons

Amount of NO produced by burning 4tons = $4\,tons\,of\,coal\times \frac{0.73tons}{100\,tons\,of\,coal}=0.0292\,tons$

This nitrogen is converted into NO by reacting with atmospheric oxygen.

8 0

2 years ago

stepan [7]

Metal rusts when it oxidized around moisture.

4 0

2 years ago

poizon [28]

Same Question here answered by me with explanation check the link below for your answer.

8 0

2 years ago