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Question- Iodine-131 is a radioactive isotope. After 4.00 days, 70.8% of a sample of I-131 remains. What is the half life of I-131?
Mention step wise computation of your work done
A cube of osmium metal 1.500cm on a side has a mass of 76.31g at 25°C. Calculate the mass of 0.1500L of benzene at this temperature.
Consider the following electrochemical cell at 298 K. One compartment contains a 1.00-M solution of silver nitrate. The other compartment contains a saturated solution of silver iodide
Calculate how many degrees of un-saturation the compound with the molecular formula C9H7O3N2S Cl4Br contains.
Taking 100 kg of the 20% feed solution as a basis, draw and label a flowchart of this process labeling both masses and volumes, and do the degree-of-freedom analysis. Calculate the feed ratio
What is the molarity of an aqueous solution containing 75.3 g of glucose (C6H12O6, mol wt = 180 g/mole) in 35.5 mL of solution
question a gas expands and does p-v work on the surroundings equal to 315 j. at the same time it absorbs 121 j of heat
When 20.4 grams of the strong electrolyte sodium phosphate are dissolved in 143 grams of water, a. What is the molality of the solution. What is the %w/w of sodium phosphate
One mole of an ideal gas with a volume of 1.3 L and a pressure of 6.9 atm is allowed to expand isothermally into an evacuated bulb to give it a total volume of 3.1 L. Calculate w and q. Also, calculate qrev for this change of state.
Problem- A test tube contains an unknown yellow solution and no precipitate. 1) Based on your lab observations from the last 2 weeks, what cation might be present
circle the correct choices to indicate how many electrons each element must gain or lose to form an octet
Liquid hydrogen peroxide, an oxidizing agent in many rocket fuel mixtures, releases oxygen gas on decomposition.
consider the titration of 50.00 ml of 0.1000 m hno2 ka 7.1bull10-4 with 0.1000 m naoh solution. what is the ph after
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