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3 years ago

In his proposed model of the atom, J.J. Thomson imagined the atom contained _____.

Chemistry

2 answers:

lara [203]3 years ago

6 0

<span>electrons and space filled with wispy positive charge I would love if I could get brainliest :)

</span>

Sidana [21]3 years ago

6 0

Answer:

In his proposed model of the atom, J.J. Thomson imagined the atom contained positive charge with electrons embedded around it.

Explanation:

J.J. Thomson in his model of atom imagined that an atom is a positively charged sphere in which negative charge that is electron(s) are distributed randomly around it. This model of an atom was also known as plum pudding.

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What is mean by kinetic energy

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The energy that an object has is moving

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2 years ago

A first-order reaction (A → B) has a half-life of 25 minutes. If the initial concentration of A is 0.900 M, what is the concentr

Oksanka [162]

Answer:

0.6749 M is the concentration of B after 50 minutes.

Explanation:

A → B

Half life of the reaction = $t_{1/2}=25 minutes$

Rate constant of the reaction = k

For first order reaction, half life and half life are related by:

$k=\frac{0.693}{t_{1/2}}$

$k=\frac{0.693}{25 min}=0.02772 min^{-1}$

Initial concentration of A = $[A]_o=0.900 M$

Final concentration of A after 50 minutes = $[A]=?$

t = 50 minute

$[A]=[A]_o\times e^{-kt}$

$[A]=0.900 M\times e^{-0.02772 min^{-1}\times 50 minutes}$

[A] = 0.2251 M

The concentration of A after 50 minutes = 0.2251 M

The concentration of B after 50 minutes = 0.900 M - 0.2251 M = 0.6749 M

0.6749 M is the concentration of B after 50 minutes.

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2 years ago

Which chemical equations show a precipitation reaction?

Anestetic [448]

A and D

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2 years ago

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6. Who stated that matter is not composed of particles

Elena L [17]

After careful consideration your answer is...

Leucippus and Democritus

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~Alanna~

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2 years ago

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A bucket of water contains 5.45 L of water, how many mL of water is this ?

nalin [4]

Answer: It is 5450 mL

Explanation: There are 1000 mL in every L and then there is an extra 450 so just add that at the end

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3 years ago