3 years ago

Can someone help me do my work

Chemistry

1 answer:

Readme [11.4K]3 years ago

5 0

Yes what is your question

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Which of these is an example of a chemical reaction that occurs at a very fast rate?

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I believe the answer is an explosion

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Which two parts of the atom are found in nucleus?

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protons and neutrons are found in nucleus

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Does neon have a larger atomic radius than argon

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2 years ago

How much heat is absorbed/released when 20.00 g of NH3(g) reacts in the presence of excess O2 (g) to produce NO (g) and H2O (l)

FrozenT [24]

Answer:

a. 342.9 kJ of heat are absorbed.

Explanation:

Calculation of the moles of $NH_3$ as:-

Mass = 20.00 g

Molar mass of $NH_3$ = 17.031 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{20.00\ g}{17.031\ g/mol}$

$Moles= 1.1743\ mol$

Given that:- $\Delta H=+1168\ kJ$

It means that 1 mole of $NH_3$ undergoes reaction and absorbs 1168\ kJ of heat

So,

1168 mole of $NH_3$ undergoes reaction and absorbs $1168\times 1168\ kJ$ of heat

<u>Amount of heat absorbed = + 342.9 KJ</u>

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3 years ago

Please help do in 5 mins This system that breaks down food and absorbs food is called

slamgirl [31]

Answer:

the digestive system

Explanation:

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