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.
Expected delivery within 24 Hours
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.
1939608
Questions Asked
3,689
Active Tutors
1425235
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
but I would like to discuss to what extent employers should/should not influence or curb political participation in their workplaces.
Suppose you are the head of an island nation with a poor, growing population and the natural resources of the island are being degraded.
Question: What was the economic and political impact, if any protect the health and welfare to citizens ?
Problem: Article 3 of the Texas Constitution sets up the Texas Legislature. It also does which of the following?
Summarize how the ERA can be ratified and explain why this is the most likely way. You will draw on instances that are important to you
Which amendment to the U.S. Constitution is often called the "States' Rights Amendment" and is commonly used by states to challenge
Mechanisms of State-Led Development:** - **Industrial Policy:** Both countries used targeted industrial policies to support specific sectors, such as electroni