1. Give one possible error you could have made in carrying out the experiment (not a
calculation error) that would cause your
a) percent NaCl to be too small
b) percent SiO2 to be too large
2. Solubilities of Compounds A, B and C were determined and summarized in the following
table:
cold water hot water
A.) insoluble soluble
B.) insoluble. insoluble
C.) soluble. Soluble

a) Describe the process you would use to separate compounds A and B if both
compounds were present in a mixture.
b) If compounds A and C were present in a mixture, could they be separated using
hot water? Why or why not?
c) Circle correct letter of compound for each consecutive step and give reasons for
your answers. You have a mixture of the 3 compounds above, A, B and C.
1) You add hot water to the mixture and filter: A, B, C remains on the filter paper.
2) You chill the solution that passed through the filter paper and filter again:
A, B, C remains on the filter paper.
3) You evaporate the water from the solution in the beaker and A, B, C remains
in the beaker.

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis

Ammonia and oxygen react to form nitrogen monoxide and water, like this: 4nh3 (g) + 5o2 (g) → 4no (g) + 6h2o (g) also, a chemist finds that at a certain temperature the equilibrium mixture of ammonia, oxygen, nitrogen monoxide, and water has the following composition: compound pressure at equilibrium nh3 65.1atm o2 31.3atm no 62.7atm h2o 65.8atm compound pressure at equilibrium nh3 65.3 atm o2 7.79 atm no 12.1 atm h2o 65.8 atm calculate the value of the equilibrium constant kp for this reaction. round your answer to 2 significant

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.