Answer:
1) 1.808 *10^8 vacancies per cm^3
2) 101,64ºC
Explanation:
You can use the following equation relating the number of vacancies with the energy required to produce them and the temperature:
Where N is the number atoms per unit of volume, you can calculate this number with the density of copper:
And you can substitute all values in the equation:
Now you solve for temperature and and use n as 1000 times the value of before:
A liquid is some type of gas and we use liquid every day
Answer:
E) 0.90
Explanation:
In TLC (Thin-Layer-Chromatography) retention factor RF is defined as the ratio between distance of the sample and the solvent front. RF is very important in chemistry to know the composition of any sample by comparison.
In the problem, as the sample has a distance of 0,20cm from the solvent front, the distance of the sample is:
2,0cm - 0,20 cm =<em> 1,8 cm</em>. Thus, RF is:
RF = 1,8cm / 2,0cm = 0,90
<em>E) 0,90</em>
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I hope it helps!
The phosphorus cycle occurs more slowly than both the carbon cycle and the nitrogen cycle because of the reason phosphorus rarely occurs as a gas. Both nitrogen cycle and carbon cycle are found in the air as a gas and will always be ready to absorb by the body while phosphorus cycle is not in the air as a gas but rather moves slowly from deposits on land to living organism.
Answer:
At a constant 100km/hr, you would travel 600km
Explanation:
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