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In order for a hydrogen atom to be capable of hydrogen bonding, what is required?
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
degree celsius in a heat exhanger by 54430 kg/h of hot gas flowing counterflow and entering at 427 degree celsius. (Cpm=1.005 kj/kg*K). The overall Uo=69.1 W/m^2*K. Calculate the exit gas temperature and the heat transfer area.
For the reaction shown, compute the theoretical yield of the product (in moles) for each of the following initial amounts of reactants. 2mn(s) = 2O2(g) --> 2MnO2(s) a) 3 mol Mn, 3 mol O2 b) .235g Al, 1.15g Cl2
How many grams of MgCl2 will be produced when 15.8 g of Mg are mixed with 14.6 of Hcl. How many grams of CO2 does a plant use to make 100 g of sugar
if 2000 l of hard water contains 0.022 m ca2+ and 0.0070 m mg2+, how many moles of na+ are needed to replace these ions?
Suppose you have a glass tube which is 1 m long and 2.5 cm in diameter. Concentrated HCl acid is placed at one end of the tube and concentrated NH3 solution is placed at the other end.
A buffer system contains .55 M acetic acid and .47 M sodium acetate. What is its pH? The Ka for acetic acid is 1.8x10^-5.
One of the side effects of taking non-steroidal anti-inflammatories like aspirin and ibuprofen is a degradation of the integrity of the stomach lining.
New ads for the toyota Prius claim that it has saved over 1 billion gallons (2.8 x 10^9kg) of gasoline. Assuming that gasoline is 100% octane (C8H18) how much has the prius reduced emissions of carbon dioxide.
Calculate the concentration of ethanol in wine in terms of mass percent and molality. mass percent? answer in % molality? answer in mol/kg
he initial rate of reaction of H2O2 -- H2O + 1/2O2 is found to be 1.7*10^-3 M S^-1. Assume that this rate holds for 2 minutes. Start with 165ml of 1.60M H2O2 at t=0. How many milliliters of O2 measured at 24C and 757mmHg
Using formal charges, draw the resonance form from among all the Lewis structures that is most important in describing BeCl2.
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