Calculate the percent of a strontium sample left
Calculate the percent of a strontium sample left after 100 years. The half-life of strontium-90 is 28.1 years.
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oleic acid has following compostions : 76.54%C, 12.13%H, 11.33% O. If the experimental molar mass is 282.g/mol, what is the molecular formula of oleic acid?
What is the half-life of a compound if 87 percent of a given sample of the compound decomposes in 65 min? Assume first-order kinetics.
3.60 g of liquid methanol, CH3OH, is placed in an empty 20.0 L container at 45.0°C. If the volume of the container is compressed to 1.40 L at 45.0°C, how many grams of vapor are present?
Gas cylinder a has a volume of 48.2L and contains N2(g) at 8.35 atm at 25 degrees C. Gas cylinder b, of unknown volume, contains He(g) at 9.50 atm and 25 degrees C.
Calculate the pH at each point indicated when 100 mL of .100 M HF is titrated with .200 M KOH: a) before addition of KOH b) after .15 mL KOH c)after addition of 50mL KOH d) after addition of 75 mL KOH.
In the titration of 50.0 mL of 1.0 M methylamine, CH3NH2 (Kb = 4.4 10-4), with 0.50 M HCl, calculate the pH under the following conditions.
A fluorinated organic gas in a cylinder is compressed from an initial volume of 960 mL at 158 Pa to 478 mL at the same temperature. What is the final pressure? Answer in units of Pa.
In an experiment, 201 mL of wet H2 is collected over water at 27 °C and a barometric pressure of 733 torr. The vapor pressure of water at 27 °C is 26.74 torr.
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The hyperarousal cluster is characterized by heightened awareness and emotional reactivity. Survivors may have exaggerated startle responses
Question: For school-aged children, language development? Need Assignment Help? Group of answer choices
Jordan is a high school student who is simultaneously an athlete, an older sibling, and a member of the student council.
Select a topic impacting family systems in which you will become an expert and teach to your classmates.
In this assignment, you will create a strategy chart evaluating literacy strategies as they relate to the five reading components.
Please select a creative idea for your capstone and submit a 3-5 page proposal for preliminary topic approval by your instructor.
Rawls argues that inequalities are only just if they benefit the least advantaged, while Nozick defends individuals' right to keep what they earn.