A0.8525 g sample of an unknown acid requires 55.69 ml of 0.1189 m naoh for neutralization to a phenolphthalein end point. there are 1.43 ml of 0.1027 m hcl used for back-titration. how many moles of h+ are there in the solid acid?

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hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

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