The environment can be changed in many ways, both by humans and nature. Some of these changes are good, while some are not. Sort the activities below according to whether they will have a positive or negative impact.

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Earthquake activity causing damage in a major city.
Planting native bushes to help control erosion.
Producing and emitting smog from a smokestack.
Volcanic eruption resulting in the formation of an island.
Positive impact Negative impact

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

What role does weathering have in shaping earth’s surface? a) it allows sediments to fall out of a medium. b) it sediments settle on a new surface. c) it breaks down older material into sediments. d) it transports sediments to a different location. will give brainliest, answer quickly.