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Describe the specific active ingredients which serve as the sunscreen agents. List the ingredient name and corresponding SPF value ??
Problem- 10 ml of 6M HCl is used during this lab. How much Na2CO3 would be required to neutralize this much acid
The meat from one hazelnut has a mass of 0.985 g. a. What is the mass of a millionth of a mole (10^-6) of hazelnut meats. b. How many moles are in a pound of hazelnut meats
A voltaic cell consists of an Mn/Mn2+ half-cell and a Pb/Pb2+ half-cell. Calculate [Pb2+] when [Mn2+] is 2.7 M and Ecell = 0.37 V.
Problem- An automobile antifreeze solution contains 2.50kg of ethylene glycol, CH2OHCH2OH, and 2.25 kg of water. Find the mole fraction of ethylene glycol in this solution. What is the mole fraction of water
Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons.
Problem- The city of LA is now 2400 mi south of alaska. If LA is to arrive near Anchorage Alaska in 76million years at what average rate will it have to move in mm per month
If you have 290 mL of water at 25 C and add 110 mL of water at 95 C, what is the final temperature of the mixture
analysis 0.5ppm zinc by atomic absorption digested and filtered into 100 ml volumetric diluted to volume. 5ml aliquot
for analysis a short peptide seven residues long is treated with fdnb followed by complete acid hydrolysis and amino
Presume that in a certain semiconductor the ratio of electronic mobility, µe, to hole mobility, µh, is equal to 10, the density of holes is Nh=1020 m-3, as well as the density of electrons is Ne=10-19 m-3. The measured conductivity is 0.455 ohm-1...
A car gets 9.2 kilometers to a liter of gasoline. Assuming that gasoline is 100% octane which has a specific gravity of .69, how many liters of air (21% oxygen by volume at STP) will be requiered to burn the gasoline for a 1250 km trip? assume com..
What is the sum of the stoichiometric coefficients when the reaction is balanced to lowest common denominator
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