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Calculate the wavelength (in picometers) associated with a hydrogen atom moving at a speed of 3.13 x 10^5 cm/s.
A white precipitate formed. This mixture was centrifuged and separated, and the clear solution was then treated with 1 M Na2Co3. No Preceipitate formed. Which metal ions were present in your unknown? Which metal ions were absent
what is the broglie wavelength of an electron moving at one-tenth the speed of light. mass of the electron = 9.109* 10^-28
How much Fe++ could be present in water containing 0.4 x 1e-02 M HCO3- (bicarbonate) without causing the precipitation of FeCO3 (Ksp=10**(-10.7))
Using electronegativity arguments, classify the following diatomic molecules as nonpolar (N), polar (P), or ionic (I). (Use the drop down menus to choose your answers
While in Europe, if you drive 109 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 29.0 mi/gal? Assume that 1euro=1.26 dollars.
Nitrogen and hydrogen gases react to form ammonia gas. N2(g) + 3 H2(g) 2 NH3(g) At a certain temperature and pressure 1.4 L of N2 reacts with 4.2 L of H2. If all the N2 and H2 are consumed, what volume of NH3, at the same temperature and pressure,..
A single pulse of a laser yields an average of 5.00 × 1018 photons with λ = 633 nm. If melting ice to water at 0°C requires 6.01 kJ/mol, what is the fewest number of laser pulses need to melt 10.0g of ice?
what is the pH of a solution made by mixing 30.00mL of .10M acetic acid with 40.00 mL 0f .10M KOH? Assume the volumes are additive and Ka=1.8*10^-5 for CH3CO2H
containing too little oxygen to allow complete combustion of the fuel is called a rich mixture. A high-performance heater that burns propane, C3H8(g), is adjusted so that 100.0 g of O2(g) enters the system for every 100.0 g of propane. Is this mix..
A solution of a dye in a 0.80 cm cuvette of concentration 1.25 x 10^-3 M had an absorbance of 0.115 at a particular wavelength. What was the molar absorptivity of the dye
10.9g of ice at 0.00 degrees C is mixed with 50.0g of water at 32.0 degrees C. What is the final temperature of the mixture? (heat of fusion=333J/g; specific heats: ice=2.09J/gK; water=4.184J/gK
a chemical reaction produces 0.884mol of H2S gas. what volume will that gas occupy at STP?
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