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Allisa [31]
2 years ago
6

What new characteristic did John Dalton add to the model of the atom?

Chemistry
2 answers:
Svetradugi [14.3K]2 years ago
5 0

Answer:

The correct option is 3

Explanation:

From the theory that he postulated that

  • Elements are made up of extremely small particles called atoms
Tema [17]2 years ago
3 0

Answer:

4 is the correct answer since that belongs to one of his postulates.

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The mass of the atom is found by adding is protons and neutrons the electrical charge of an atom is found by adding the charge i
Hitman42 [59]
When you combine protons and neutrons in the electrical charge they combine to make electricity
3 0
3 years ago
The pyrolysis of ethane proceeds with an activation energy of about 300 kJ/mol. How much faster is the decomposition at 625°C th
Alona [7]

Answer:

The decomposition of ethane is 153.344 times much faster at 625°C than at 525°C.

Explanation:

According to the Arrhenius equation,

K=A\times e^{\frac{-Ea}{RT}}

\log (\frac{K_2}{K_1})=\frac{Ea}{2.303\times R}[\frac{1}{T_1}-\frac{1}{T_2}]

where,

K_2 = rate of reaction at T_2

K_1 = rate of reaction at T_1

Ea = activation energy of the reaction

R = gas constant = 8.314 J/K mol

E_a=300 kJ/mol=300,000 J/mol

T_2=625^oC=898.15 K,T_1=525^oC=798.15 K

\log (\frac{K_2}{K_1})=\frac{300,000 J/mol}{2.303\times 8.314 J/K mol}[\frac{1}{798.15 K}-\frac{1}{898.15 K}]

\log (\frac{K_2}{K_1})=2.185666

K_2=153.344\times K_1

The decomposition of ethane is 153.344 times much faster at 625°C than at 525°C.

4 0
3 years ago
Can anyone help me on this ques pls, much appreaciated
Sloan [31]

Answer:

Option D is Correct answer

4 0
2 years ago
Read 2 more answers
For her school Science Fair, Alyssa designs an experiment to learn more about erosion. Her experimental set up is shown below. W
shutvik [7]

Answer:                                                                                                                                

if I am going to answer I need the set up

Explanation:

please show the set up and I will answer the question

8 0
2 years ago
If we start with 20 atoms of plutonium – 239, how many would remain after 48,240 years?
Zepler [3.9K]

Answer:

If we start with 20 atoms of plutonium – 239, how many would remain after 48,240 years?

Explanation:

So, before we are going to tackle this topic, I would discuss how to remain it as soon as possible. Like this, go to the site with so many answers to be seen. So m SC ndkz ek Afe sifrhidbjdjwsb in free jdbsjjkn WA jdj ew

7 0
2 years ago
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