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The mass of an electron is 9.11\times 10^{-31}~\rm kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31\times 10^{-10}~\rm m, how fast is the electron moving relative to the speed of light? The speed of light is 3.00\times10^8 ~\rm m/s.
What is the charge on magnesium iodide? What does the charge on the magnesium ion have to do with the number of valence electrons that an atom of magnesium has?
Calculate the of 0.280L of a 0.450M NaHSO3 - 0.285M Na2SO3 buffer before and after the addition of the following substances.
how much heat does your body lose when 2.95g of sweat evaporates from your skin at 25 degrees Cecilius
how many milliliters of .100 M NaOH are required to neutralize 50.00 mL of .215 moles of H2SO4
The NaOH Solution with a concentration of .188M is used to titrate a diprotic acid of unknown concentration. 25.00 mL of the acid solution requires 26.54 mL of NaOH solution. What is the concentration of the acid solution
The solubility of MX in a solution buffered to pH=2.00 is only 3.17 x 10^-8M. It turns out that HX is a weak acid. (Ka= 1.00 x 10^-15M)
The following arrangement of flasks is set up. Assuming no temperature change and no chemical reaction, determine the final pressure inside the system after all stopcocks are opened and equilibrium is reached. The connecting tube has no volume. 1s..
If the temperature in the chamber is 103 °C after the charge is ignited, what is the pressure, in atmospheres, behind the cannonball when the gunpowder goes off?
A chemist needs to determine the concentration of a solution of nitric acid, HNO_3. She puts 865 mL of the acid in a flask along with a few drops of indicator.
A buffer is prepared by mixing 184 mL of 0.442 M HCl and 0.500 L of 0.400 M sodium acetate
I understand that the height of a peak in NMR spectroscopy indicates the number of identical hydrogens in that particular group. But what does it mean when peak height is measured in non-H units lacking a common denominator
Which one of the following is the correct formula resulting from a combination of the common ions from these elements: Li and S
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