Help i'll give brainliest! help with 15 just make the answer clear please (PLEASE COMMENT IF YOU CAN"T SEE THE PICTURE DONT ANSWER!)

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Explanation:

the thermal battery could help this type of generator produce energy 24 hours a day by using a salt. during the day, the mirror warms up the salt till it's melted, then, at night, the very hot salt can be used to boil water, producing steam and that steam could go into a generator that uses pressure

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume