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Some second-order reaction has an activation energy of 1,151 kJ / mol. This reaction has a constant speed of 0.0796 M-1s-1 to 737 ° C. The temperature at which the reaction will have a constant speed of 0.0815 M-1s-1
Please classify each of the following substances as a strong acid, weak acid, strong base, weak base or neutral.
calculate the heat released when 2.58 l of cl2g with a density of 1.88 gl reacts with an excess of sodium metal at
Calculate the volume occupied 1.50g 7.00g of O2 and Cl2 react when mixed without exerting a pressure 482atm to 22 degrees Celsius.
gypsum is hydrated calcium sulfate. a 4.89 g sample of this hydrate was heated and after the water was driven off 3.87g
calculate number of moles of anhydrous compound recovered. c- calculate number of moles of water lost from the hydrated compound.d- what is the formula of the hydrate?
If 100mL of 0.01 M CaCl2, 100mL of 0.01 M Sr(NO3)2 and 100 mL of 0.01 M Na2SO4 are mixed together; what is the Ca2+ concentrationin solution and which precipitates will form?
muscle cells need energy to contract. one biochemical pathway for energy transfer is the breakdown of glucose to
An electron in an excited state of a hydrogen atom emits two photons in succession, the first at 1281 nm and the second at 102.5 nm, to return to the ground state (n=1).
A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of m = 0.700fg (where a femtogram, fg, is 10?15g) and is swimming at a velocity of v = 2.00?m/s , with an uncertainty in the velocity of 8.00 %
The human eye is able to detect as little as 2.35E-18 J of green light of wavelength 510 nm. Calculate the minimum number of photons of green light that can be detected by the human eye.
Why can you not prepare a solution of pH=8 by diluting sufficiently a 0.01M solution of HCl with water
a 1.5-kg copper block is given an initial speed of 4.0 ms on a rough horizontal surface. because of friction the block
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