The answer is A, biogeochemical cycles.
Answer:
Copper is a metal made up of copper atoms closely packed together. As a result, the electrons can move freely through the metal. For this reason, they are known as free electrons. They are also known as conduction electrons because they help copper be a good conductor of heat and electricity.
Explanation:
Answer:
B. their outer electron levels are filled
Answer:
Volume of chlorine solution required is around 1.2 L
Explanation:
Volume of water in the pool = 2.0*10^4 gal
1 gal = 3.79 L
Therefore, volume of water in the pool in units of Liters would be:
Density of water = 1 g/ml = 1000 g/L
The accepted concentration of chlorine = 1 g/ 10⁶ g water
Therefore amount of chlorine required to disinfect the pool water would be:
The given solution is 6.0% w/w chlorine i.e.
6.0 g chlorine in 100 g solution
Therefore, amount of solution corresponding to 74 g chlorine would be:
Density of the solution = 1 g/ml
The color emitted from a hydrogen spectrum is not white because only colors with certain energy levels can be observed.
Explanation:
White light is generally a combination of seven colors having different wavelengths from the range of 400nm to 700nm, with violet having the wavelength of 700nm and red having 400nm. This shows that white light cannot be given a separate wavelength.
During the hydrogen emission spectrum, the colors with higher wavelengths are observed in the emission and thus there is no white light.