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Lyrx [107]
3 years ago
9

A girl and her dog are running away from their house. The dog has a mass of 20kg. The girl has a mass of 60 kg.

Chemistry
1 answer:
zloy xaker [14]3 years ago
6 0

Answer: 160 joules

Explanation: the formula for kinetic energy is KE= 1/2 x m x v squared (ke being kinetic energy, m being mass of the object and v being velocity). To find the kinetic energy, you must plug in the given values. KE= 1/2 x 20 x 4 squared. 4 squared is 16, 16 times 20 is 320 and 1/2 of that is 160- so that’s your answer.

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The given question is incomplete, the complete question is:

A reaction between liquid reactants takes place at 10.0 °c in a sealed, evacuated vessel with a measured volume of 35.0 L. Measurements show that the reaction produced 28. g of dinitrogen difluoride gas. Calculate the pressure of dinitrogen difluoride gas in the reaction vessel after the reaction. You may ignore the volume of the liquid reactants. Round your answer to 2 significant digits. pressure:atm

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The temperature mentioned in the given reaction is 10 degree C, which after conversion becomes 283 Kelvin (273+10 = 283K).  

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= 0.424

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