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Explain what is the number of radioactive K-40 nuclei if Nt =6.27 x 10 to the negative 4 x 1 mole k-40/Molar mass x 6.022 x 10 to the 23/ 1 mole
Each was extracted with three 5-mL aliquots of CCl4 containing an excess of 8-hydroxyquinoline. The extracts were diluted to 25 mL and their fluorescence was measured. What is the concentration of the zinc in the unknown solution Volume of Zn sta..
Do not include units in your response. Open the hint panel for an identical flow chart you can view while filling in the responses below. 1 If the plant wishes to produce 450.0 g/min of brown sugar today, what is the feed rate, m1. What is the flow ..
If fuel mixtures are required to contain 3.0 oxygen by mass, how many grams MTBE must be present in each 110 gasoline.
a sample of gas is collected over water at a temperature of 35.0c when the barometric pressure reading is 763 torr.
Calculate the equilibrium [F-] in a saturated solution of CaF2 and 0.0214 M Ca(NO3)2. Take ionic strength effects into account.
After the vessel was pressurized with hydrogen gas and heated to 80 degrees C, the monometer showed the initial pressure inside the "bomb" to be 77.2 atm. Assuming 100% yield, calculate the pressure that should be inside the "bomb" when the reacti..
A 1.800 g sample of octane, C8H18, was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/°C. The temperature of the calorimeter plus contents increased from 20.01°C to 29.99°C. What is the heat of combustion per gram of octane?
A beaker with 200 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 6.40 mL of a 0.400 \it M \rm HCl solution to the beaker.
Explain if solid sodium sulfate is added to the Pb (NO3)2 solutions, a precipitate of PbSO4 will form. Utilizing the Nerst equation to predict how the cell potential will change.
how many enantiomeric pairs are possible for a monobromo derivative of isopentane?
What reaction occurs with water. Calculate the pH of a 0.10 M solution of NaHSO4. If solid Na2CO3 is added to the solution of NaHSO4, what reaction occurs between the CO3- and HSO4- ions
A student performs a series of calorimetry experiments. She determines the calorimeter constant (Ccal) for her coffee cup calorimeter. She pours a 50.0 mL sample of water at 345 K into the calorimeter containing a 50.0 mL sample of water at 298 K.
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