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Calculate the vitamin C content of a green pepper (mg vitamin C/g green pepper) if 19 grams of green pepper was extracted into a total extract volume of 54 mLs. Then 5.00 mL of the extract was titrated to the endpoint with 16 mLs of N-bromosuccinimide(NBS). Each mL of NBS corresponds to 0.25 mg of vitamin C. Write your answer in scientific notation with the correct number of significant figures but do not use units in your answer. For example, 2.50 X 10-3 would be 2.50E-3.
Background: Lake Lianna is fed by two rivers, the Matthew and the Andrew. You have made careful water chemistry measurements throughout the year and found that the two rivers have the following pH and alkalinity
A 0.100g of plant food was reacted and 0.963g of MgNH4PO4*6H2O was recovered. What is the mass% of P in the original sample?
Sorbic acid is a weak monoprotic acid with Ka = 1.7x10-5. Its acid anion salt (potassium sorbate FW = 150 g/mole) is added to cheese to prevent mold. What is the pH of a solution that contains 4.93 g of potassium sorbate in 0.5 L of solution
A 16.4-L sample of gas at STP is heated to 55°C at 605 torr. What is the new volume?
basketball with a volume of 3.50 Liters is left in a car when the temperature is 298 K. What will the volume of the ball be as the car heats up to 305 K during the day?
What is the BOD concentration just downstream of the discharge point? (b) If the stream has a cross-sectional area of 10 m2, "what is the BOD concentration 50 km downstream? (BOD is removed with a first-order decay rate con- stant equal to 0.20/da..
When 0.105 mol propane is burned in an excess of oxygen, how many moles of oxygen are consumed? The reaction is C3H8 + 5 O2 ? mol O2 = 0.105 mol C3H8 How many grams of nitric acid are produced for every 100.0 g NO2 that reacts?
An additional atm pressure of HI is admitted to the con- tainer, and it is allowed to come to equilib- rium again. What is the new partial pressure of HI?
calculate the composition of the vapor phase at 25 °C if the vapor above the liquid phase is composed only of 1-propanol and 2-propanol
Further recylcing reactions that would take the products back to some of the monomers. What reactions to use? What would you get as products
At the equivalence point all carbonate has been converted to bicarbonate NEt ionic equation before the equivalence point: Net ionic equation at the equivalence point
The Vehicle Assembly Building at the Kennedy Space Center in Florida has a volume of 3,666,500 m^3. Convert this volume to liters and express the result in standard exponential notation.
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