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ololo11 [35]
3 years ago
5

1. If a gas exerts a pressure of 2.00 atm when 20. puffs of particles are present, how many puffs are necessary to increase the

pressure to 4.50 atm?​
Chemistry
1 answer:
Juliette [100K]3 years ago
7 0

Si un gaz exerce une pression de 2,00 atm lorsque 20 bouffées de particules sont présentes alors pour 4,50 atm il faut 45 bouffées car 20 bouffées = 2,00 atm donc 2*20=40 +0,5 =4,50

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Based on table N of the reference tables what is the number of hours required for 42k (potassium -42) to undergo three half-life
skelet666 [1.2K]

The number of hours required : 37.2 hours

<h3>Further explanation</h3>

Given

⁴²K (potassium -42)

Required

The number of hours

Solution

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Usually, radioactive elements have an unstable atomic nucleus.  

Based on Table N(attached), the half-life for ⁴²K is 12.4 hours, which means half of a sample of ⁴²K will decay in 12.4 hours

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3 years ago
Question 1 (1 point)
lilavasa [31]

Answer:

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You work in a museum that has a huge, beautiful stamed-glass window: Each gamell dints the light a different coice. Recenty up a
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<h3>What is visible spectrum?</h3>

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