Kim is doing an experiment with sound waves. she tested to see how quickly a sound wave could travel through three different materials: a metal pole, a helium balloon and a glass of water. she recorded her results. which of the following is most likely true? group of answer choices the sound wave traveled more quickly through the water than the balloon. the sound wave traveled the slowest through the metal pole. the sound wave traveled the fastest through the helium. the sound wave traveled more quickly through the glass of water than the metal pole.
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Compare and contrast physical changes with chemical changes.
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Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .
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If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted
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Kim is doing an experiment with sound waves. she tested to see how quickly a sound wave could travel...
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