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3 years ago

Jacob eats a snack, and then plays basketball with his friends. When he shoots the basketball at the hoop, he is changing _____.

Chemistry

1 answer:

olchik [2.2K]3 years ago

3 0

A because it requires energy from food to move which is mechanical

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Explain the three laws of chemical reaction in detain gilling examples

kotykmax [81]

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Hope this helps, have a good day.✌

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2 years ago

Driving cars lowers the pH of the oceans by _______.

Naddika [18.5K]

A) releasing CO2 that dissolves and forms acid in the oceans (i think i'm sorry if its wrong)

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3 years ago

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Assume that coal can be represented by the chemical formula C135H96O9NS. If 4.0 tons of coal is burned, what mass of nitrogen is

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.

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3 years ago

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C2H4(g) + H2(g) ----> C2H6(g)

sertanlavr [38]

D because wants you add the equation it should increase temp but decrease the value in pressure

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