A student is performing a titration on a solution of HNO3 with an unknown concentration. They used a solution of KOH that they determined the concentration to be 8.2 x 10-2 M beforehand. They use an aliquot of 15.0 mL of HNO3 to titrate. a. If the equivalence point is reached after the addition of 18.5 mL of titrant, what was the original pH of the analyte? [1.00]
b. What would the pH of the analyte be at the equivalence point? [You should be able to figure this out yourself!]
c. If the student over-titrates the analyte and adds 19.2 mL of titrant, what would the pH of the analyte be? [11.22]
d. If the student under-titrates and only adds 10.0 mL of titrant, what is the pH of the analyte? [1.56]
e. Draw a titration curve for this question.

Who is better, messi or cristiano, i need this for a chemistry class. asap

Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.

98 points you will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. before you conduct your experiment, you need to form a hypothesis. a hypothesis is a prediction of what you think will happen in the experiment. the hypothesis is a statement that describes “if” a certain set of circumstances are present “then” there will be a specific result that will occur. record your hypothesis here: record the results from step one of the experiment (dropping the objects in the air): first trial: second trial: third trial: record the results from step two of the experiment (dropping the objects in a vacuum): first trial: second trial: third trial: did the experiment support your hypothesis? using the data from your experiment, describe why you believe your hypothesis was either proven or disproven. what forces were acting on the objects dropped in the air? what force was acting on the objects dropped in the vacuum? part two: comparing forces choose two forces and compare and contrast these forces. you must provide two ways that they are alike and two ways that they are different. you may make a list, write in paragraph form, or make a chart. choose two forces and compare and contrast these forces. these must be different forces than used in the prior question. provide two ways that they are similar and two ways that they are different. you may make a list, write it out, or make a chart.