Number of photons can be calculated by dividing the needed energy by the energy per photon.
The minimum energy needed is given as 2 x 10^-17 joules
Energy per photon = hc / lambda where h is planck's constant, c is the speed of light and lambda is the wavelength
Energy per photon = (<span>6.626 x 10^-34 x 3 x 10^8) / (475 x 10^-9)
= 4.18 x 10^-19 J
number of photons = (2 x 10^-17) / (4.18 x 10^-19)
= 47.79 photons which is approximately 48 photons</span>
<span>Electronegavity is the ability of an atom to attract a shared pair of electrons in a covalent bond. Atoms with high electronegativities will attract more electrons and may occasionally steal electrons from other atoms. That said, electronegavity increases as you go across a period. I. e it increases as you move from left to right across a period on the periodic table but it decreases from top to bottom down a group. Generally non metal non-metals, located on the right side of the periodic table, have higher electronegativity. With that in mind caesium, a metal, which has an electronegativity of 0.79 is the least electronegative of them all.</span>
Answer:
b. 2-4
Explanation:
Look at the slope of the line, between 0-2 and 4-6 the slope is only 10, but between 2-4 the slope is 20, so that's when the temperature is changing the fastest. In the same time it took for the water to increase by 20 degrees between 0-2 and 4-6, the temperature of the water increased by 40 degrees between 2-4 so that's when the change is the fastest.
Answer:
Saturated.
Explanation:
Hello,
In this case, we understand that solubility accounts for the maximum amount of a solute to completely dissolve into a solvent, in such a way, sodium chloride's solubility at 25 °C is 0.36 g of NaCl per gram of water, thus, if a relationship is greater than this value, the solution will be supersaturated, if it is equal saturated and if is less it will be unsaturated. In such a way, for 43.92 g of sodium chloride and 122 g of water, the relationship result:
Thus, such solution would be saturated as the relationship equals the solubility.
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