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Sonja [21]
2 years ago
13

How much of strontium-90 will be left after 40 hours if you start with 960 grams and the half-life is 10 hours?

Chemistry
1 answer:
zmey [24]2 years ago
7 0

Answer:

5 hours

Explanation:

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When Niels Bohr refined the model of an atom,what new idea did he include?
pshichka [43]

Answer:

Niels Bohr, refined the model of an atom by proposing a quantized shell structure atomic model in order to describe how the electrons are able to maintain stable orbits around the nucleus

Based on the predictions of classical mechanics the electron motion of the Rutherford model was unstable as the electrons where expected to have lost some energy during motion and thus having to come rest in the nucleus

According to the modification by Neils Bohr in 1913, electrons move in  shells or orbits of fixed energy and emission of electromagnetic radiation takes place only when electrons changes the orbit in which they move

Explanation:

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3 years ago
How much eat is absorbed when 50.0g of water changes from 25.0 Celsius to 37.0 Celsius?
Firdavs [7]
27 I think beacuse if you subtract
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3 years ago
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A gas is contained in a thick-walled balloon. When the pressure changes from 45.0 bar to 96.0 bar, the volume changes from 1.20
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P1 * V1 ÷ T1 = P2 * V2 ÷ T2  

45 * 1.20 ÷ 314 = 96 * V2 ÷ 420  

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V2 = 22,680 ÷ 30,144  

The new volume is approximately 0.75 liter.

I hope I helped

5 0
3 years ago
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In order to promote the common ion effect, the concentration of the common ion must first:_____.
Svet_ta [14]

We need to increase the concentration of common ion first, in order to promote the common ion effect

<h3>What is the Common ion effect?</h3>

It is an effect that suppresses the dissociation of salt due to the addition of another salt having common ions.

For example, a saturated solution of silver chloride in equilibrium has Ag⁺ and Cl⁻ . Sodium Chloride is added to the solution and has a common ion Cl⁻. As a result, the equilibrium shifts to the left to form more silver chloride. Thus, solubility of AgCl decreases.

The Equilibrium law states that if a process is in equilibrium and is subjected to a change

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then the equilibrium shifts in a particular direction, according to the condition.

Thus, an increase in the concentration of common ion promotes the common ion effect.

Learn more about common ion effect:

brainly.com/question/23684003

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3 0
2 years ago
An atom has 5 protons, 4 electrons, and 5 neutrons. Which
Likurg_2 [28]

Answer:

i think the answer is C

Explanation:

not sure plsss dont bash im a beginner

3 0
3 years ago
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