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jenyasd209 [6]
3 years ago
12

How many prime numbers are there between 0 and 75​

Chemistry
2 answers:
slamgirl [31]3 years ago
8 0

Answer:

There are 21 prime numbers between 0 and 75.

Explanation:

2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73

Paraphin [41]3 years ago
3 0

Answer:

21

Explanation:

There are 21 prime numbers between 0 and 75​.

These include:

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73.

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Calculate the fraction of atoms in a sample of argon gas at 400 K that have an energy of 10.0 kJ or greater.
nikdorinn [45]

Answer:

The answer to this can be arrived at by clculating the mole fraction of atoms higher than the activation energy of 10.0 kJ by pluging in the values given into the Arrhenius equation. The answer to this is 20.22 moles of Argon have energy equal to or greater than 10.0 kJ

Explanation:

From Arrhenius equation showing the temperature dependence of reaction rates.

K = Ae^{\frac{Ea}{RT} } where

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we have

f = e^{\frac{Ea}{RT} }

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In the Arrhenius equation k = Ae^(-Ea/RT), the factor A is the frequency factor and the component e^(-Ea/RT) is the portion of possible collisions with high enough energy for a reaction to occur at the a specified temperature  

Plugging in the values into the equation relating f to activation energy we get

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