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Manganese makes up 1.3*1-^-4 percent by mass of the elements found in the healthy male body of a certain mammal. If 0.11 g of manganese if sound, how much does the average male body weigh?
Calculate the molarity of of each ion present in the solution. Please walk me through the steps I'm trying to help my daughter with her chem. homework and I don't know any chem.
A voltaic cell consists of Pb/Pb2+a half-cell and a Cu/Cu2+ half-cell at 25 . The initial concentrations of and are 5.10×10?2 and 1.60 , respectively. What are the concentrations of Pb2+ and Cu2+ when the cell potential falls to 0.360 V?
Calculate the sodium ion concentration when 80.0 mL of 3.2 M sodium carbonate is added to 25.0 mL of 2.3 M sodium bicarbonate.
If the initial concentration of h2o was 0.700M and after 54mins, the concentration is measured to be 0.0875M what is the half life
A gas occupies a volume of 925mL at 30 degrees celcius and 1.2atm. What volume will it occupy at STP?
How many litres of NO are produced at STP when 162 g Ag reacts with excess HNO3
Gas was obtained by boiling liquid nitrogen stored in a 175.0 L tank. What volume ofN2 is released at 0.940 atm of pressure and 25 C from a tank full of liquid N2(d=0.808g/mol)
150.g of NaCl completely dissolves (producing Na+ and Cl- ions) in 1.00k of water at 25.0C. The vapor pressure of pure water at this temperature is 23.9torr.
A solution is prepared by combining .025 mole CaCl2 and .015 mol Pb (NO3)2 and adding water to make 1L of solution. Will a precipitate of PbCl2 form in this solution
The electrode acts as the anode, and the electrode acts as the cathode. To maintain electric neutrality, you add a salt bridge separating the two half-cells. What is the net cell reaction for the chromium-silver voltaic cell?
The reaction 2NOCl(g) → 2NO(g) + Cl2 (g) has an activation energy of 100.0 kJ/mol and a rate constant at 400.0 K of 8.5 x 10-6 mol-1 L s-1. Determine the rate constant at 450 K.
large volumes of gases are released.if 100g of TNT were detonated, what would the mass of each product be? is the law of conservation of mass obeyed? 2C7H5(NO2)3--> 12CO(g)+2C(s)+5H2(g)+3N2(g)
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