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How many grams of n2h4 will be consumed by 23 g of n2o4

List four observations that indicate that a chemical reaction may be taking place

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here