Explain the need for a reference atom for Atomic mass? give some information about to reference atoms. please don't copy from Goógle​

a galvanic cell( aka voltaic cell) and electrolytic cell

explanation:

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the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary

thats how its supposed to be

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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