A 20.49 gram sample of an organic compound
containing C, H and O is analyzed by combustion analysis and
20.03 grams of CO2 and
4.100 grams of H2O are produced.
In a separate experiment, the molar mass is found to be
90.04 g/mol. Determine the empirical formula and
the molecular formula of the organic compound.
In: Chemistry
Double-Blind Experiments
Would you ever participate in a double-blind experiment? Why or why not?
In: Economics
Imagine you plan to flip a regular quarter three times. Round final answers to three decimal places (Ex. 0.xxx). Do not round until you get to the final answer. What is the mean, or expected value, of the number of heads in three coin toss experiment
In: Statistics and Probability
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 550. mL of a solution that has a concentration of Na+ ions of 0.800 M ?
Express your answer to three significant figures and include the appropriate units.
In: Chemistry
494: Which of the following is NOT true in regards to blocking?
A. A block is a dummy factor which doesn’t interact with real factors
B. A blocking factor has 2 levels
C. A block is a subdivision of the experiment
D. Blocks are used to compensate when production processes restrict randomization of runs
In: Statistics and Probability
Create a diagram of a current-carrying wire in a magnetic field. Draw the field lines and explain how the direction of force acting on the wire is determined.
#- Create a sketch of the experiment Michael Faraday performed, label all the parts, and write a brief explanation of how motion is created.
thank you
In: Physics
A complementary medicine company is interested in determining if herbal extracts can improve the efficiency of antibiotics at low concentrations. Design an experiment to determine if Echinacea diluted 1:100 can increase the effectiveness of ampicillin against E. coli when tested at 10% of the minimum inhibitory concentration of ampicillin.
In: Biology
Eugenics is a movemnet in the early 1900's that was used in the justification of a range of unethical experiment studies and other atrocities. Define "Eugenics" and the terms- Positive Eugenics and Negative Eugenics. Why is the movement discredited today? Are certain types of genetic screening examples of the return to eugenic thinking? Give an example.
In: Psychology
In a capacitor charging and discharging experiment with a resistor of 10 ohms, if we plot our data so LVC (volts) is in the y-axis and time (seconds) in the x-axis, what would the slope of the resulting line represent? how do we use this slope to calculate the capacitance of this capacitor?
In: Physics
Osmosis and Tonicity experiment:
Red blood cells prefer an isotonic (isosmotic)
environment. What happens to red blood cells place into a
hypertonic (hyperosmotic) environment? Why is that bad for a
patient?
What happens to red blood cells placed into a
hypotonic (hypoosmotic) environment? Why is that bad for a
patient?
In: Anatomy and Physiology