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What must be the velocity, in m/s, of a beam of electrons if they are to display a de Broglie wavelength of 1 nm? (the mass of an electron is 9.109x10 -28 g) (1) 7x10^5 m/s (2) 7x10^2 m/s (3) 7x10^4 m/s (4) 3x10^8 m/s (5) 7x10^7 m/s
calculate the molar solubility of calcium carbonate in 0.050 molar calcium chloride and ksp for calcium chloride is 3.8X10^-9.
What is the uncertainty in the energy of the excited state. What is the percentage uncertainty if the energy is measure from the ground state
What mass of Fe will form when 63.0g of CO reacts with 145g of Fe2O3 according to the following equation? 3CO+Fe2O3->2Fe+3CO2.
115 mL of H_2O is initially at room temperature 22 0C. A chilled steel rod at 2 0C is placed in the water. If the final temperature of the system is 21.1 0C, what is the mass of the steel bar.
How many moles of carbon monoxide react with 1 mole of oxygen gas according to the balanced chemical equation?
A soluble iodide was dissolved in water. Then an excess of silver(I) nitrate, AgNO3 was added to completely precipitate out all the iodide ion as silver(I) iodide, AgI. if 1.545 grams of soluble iodide gave 2.185g of silver(I) iodide, then
4.236-g sample of a hydrocarbon (CxHy) is combusted in O2 completely to give 3.810 g of H2O and 13.96 g of CO2. What is the empirical formula of the hydrocarbon?
if ammonia is obtained in 90% yield based on hydrogen, how many tons of hydrogen are necessary to produce 100 Mg of ammonia?
the required removal or conversion of A is 90%. If the rate constant, K, is 0.35hr-1, what is the required residence time in hours for the batch reactor?
A 391-rm mL sample of unknown rm HCl solution reacts completely with rm Na_2CO_3 to form 20.1 g rm CO_2. What was the concentration of the rm HCl solution?
4.20 g of a chloride-containing compound of Ti was obtained. What is the empirical formula of the chloride-containing compound
What is the sum of all the coefficients in the balanced equation?
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