because it is the wave lenght where the maximum absorbtion take place by the solution cantaning cupper
it can never be spontanious
Around 620 nm
Helium or He, is one of the elements on the periodic table of elements. It is made of two protons, two neutrons and two electrons, it is also a noble gas. Since helium is an element and not a compound it is made of atoms not of other elements.answ2. The daily warmth we receive from the Sun is due to the fusion of Hydrogen into Helium. Around 620 million tonnes per second!And in a super nova, when three Helium nuclei almost simultaneously fuse to form a carbon atom, at a temperature of 100 million Kelvin. All our carbon was thus made.[Temperature may be measured as the velocity of a free particle.]
The boiling point of water drops by approximately 1 degree Fahrenheit for every 550' of elevation gain above sea level (ASL). So the boiling point of water at 6000' ASL would be around 93.8 degrees Celsius or 201 degrees Fahrenheit.
The answer is 620
620
45% of 620= 45% * 620= 0.45 * 620= 279
12% of 620= 12% * 620= 0.12 * 620= 74.4
620
40% of 620= 40% * 620= 0.4 * 620= 248
6% of 620= 6% * 620= 0.06 * 620= 37.2
25% of 620= 25% * 620= 0.25 * 620= 155
It's already there.
The answer is 620
Rounded to the nearest ten it is 620
25% of 620= 25% * 620= 0.25 * 620= 155620 - 155 = 465