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liubo4ka [24]
3 years ago
5

What property is not included in Dalton’s atomic model ?

Chemistry
1 answer:
aalyn [17]3 years ago
7 0
Atoms of different elements have different structure
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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}

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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>

7 0
3 years ago
Explain why grinding the solid increases the rate of solution.
STALIN [3.7K]
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What is this and explain why please:)
Yuliya22 [10]

Answer:

C Atomic number

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The question is typo it should be 19 is the____ of pottasium. The atomic number is the number on top

8 0
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