Indicate which of the following criteria are important for the selection of a buffer to use in an in vitro biochemical reaction. (select all that apply.)
a. the molecular weight of the chosen buffer should be in the range of 150 g/mol to 650 g/mol.
b. the chosen buffer should not interfere with the biochemical reaction.
c. the makeup of the chosen buffer should include only carbon, hydrogen, nitrogen, oxygen, and phosphorus.
d. the pka of the chosen buffer should be close to the optimal ph for the biochemical reaction.
e. the chosen buffer should have a much higher concentration of its protonated species compared to the concentration of its deprotonated species at the optimal ph for the biochemical reaction.

Which of these features are formed when hot groundwater is forced out through cracks in the earth's surface?

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.

I’m an electrically neutral atomic any element, there are equal numbers of