A chlorine concentration of 0.500 ppm is desired for water purification. What mass of chlorine must be added to 2500 L of water to achieve this level?

1.25 grams of chlorine.

Explanation:

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In this case, since it is possible to define the parts per million of chlorine as the milligrams of chlorine per liters of water, in order to obtain the mass of chlorine in 2500 L, we proceed as follows:

In such a way, we plug in the given 0.500 ppm and 2500 L to obtain (in grams):

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because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates