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Problem- After preparing the above solution, the lab assistant realized that she could have prepared the solution by diluting a concentrated NaCl stock solution already prepared. How many mL of this 2.5 M stock solution would be needed to prepare 2000 mL of 0.15 M NaCl?
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Write a net ionic equation for the reaction that occurs when excess hydrobromic acid (aq) and iron(II) sulfide (s) are combined. Include states
2.00 L of H2 at a pressure of 398 torr and 1.00 L of N2 at an unknown pressure. If the total pressure in the flasks is 331 torr after the stopcock is opened,
Problem- An object is moving at 18 m/s at an angle of 220 counterclockwise from the x axis. An object is moving at 18 m/s at an angle of 220 counterclockwise from the x axis.
2.00 L of H2 at a pressure of 368 torr and 1.00 L of N2 at an unknown pressure. If the total pressure in the flasks is 336 torr after the stopcock is opened.
Indicate the kind of hybridization (sp, sp2, sp3) you expect for each carbon atom in the following molecule. Why does each carbon atom have that hybridization?
What is the resolution of an electron microscope. What is the typical energy, velocity, momentum, and de Broglie wavelength of electrons typically used in the microscope
Use values of Ksp for Zn(OH)2 and Kf for Zn(OH)4-2 (page 330) to predict if a precipitate will form when you prepare a solution which contains 0.010 M Zn2+ and 1.0 M NaOH.
if all of the atoms in a penny were to form a very thin coating onanother object a monolayer that is one atom thick
Problem- In the pyroxene kanoite the formula unit has two SiO3 2- units and is balanced by manganese and magnesium ions. Determine the formula unit of kanoite. Assume that the oxidation state of Mn is +2.
Litre of white gas, and density of the gas is 0.710 g/cm 3 . Calculate the mass of the fuel and express your answer in kgs?
Dehydration of 2-bromobutane in the prescence of a strong base proceeds via which of the following mechanistic pathways
Some of the cyclohexane solvent vaporized during the temperature versus time measurement. Will this loss of cyclohexane result in its freezing point being recorded as too high, too low, or unaffected.
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