1. Complete the balanced dissociation equation for the compound below. If the compound does not dissociate, write NR after the reaction arrow. (NH4)2S(s) ->

2. Write the balanced NET ionic equation for the reaction when Al(NO₃)₃ and Na₃PO₄ are mixed in aqueous solution. If no reaction occurs, write only NR.

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how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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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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