Determine how many grams of one of the chemicals that you investigated in the experiment are required to achieve the following temperature: hot pack, 55° C (131° F) The chemical in question is Na2CO3. The other substance in a hot pack would be water. How do I calculate the amount of Na2CO3 that is needed to heat water up to 55° C?

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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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catya your not at all which answer i've seen you do this on another question!