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If a molecule containing only oxygen and nitrogen is 36.8% Nitrogen by mass, what is the emperical formula
Determine the concentration of the sodium hydroxide solution? Considering this balanced equation given as :
The surface area of an object to be gold plated is 49.7cm2 and the density of gold is 19.3g/cm3. A current of 3.25A is applied to a solution that contains gold in the +3 oxidation state. Calculate the time required to deposit an even layer of gold..
At 80C the vapor pressures of pure liquids X, Y, and Z are 385, 190, and 66 mmHg respectively. what pressure must be exerted on the surface of a solution containing one mole of X, three moles of Y, and two moles of Z for boiling to begin at 80C
20 ml Calcium Hydroxide solution was titrated with 9.8 ml 0.0105 M HCl in according to reaction: Ca(OH)2 + 2HCl ? CaCl2 + 2H2O The true value of solubility product constant (Ksp) of Ca(OH)2 at 25 C is 1.3x10-6. What is molar solubility of Ca(OH)2 in ..
Use VSEPR theory to decide which one of the following molecules and ions will definitely have at least one 90º bond angle in it.
if a gas occupies a volume of 5 L at 546 K and 2.5 atm, what is its volume at standard pressure and temperature.
the volume of 4 cubic meters of gas is kept under constant pressure. its tempeture is increased from a minus 73 degrees celsius to 127 degrees celsius. What is the new volume of the gas?
Draw a structure for a compound that meets the following description: A compound C3H5N with an IR absorption at 2215 cm-1 but none at 3300 cm-1
Calculate the pH of the following solutions A) 0.10 M hydrogen sulfide? B) 1.0*10^-4 M benzoic acid (check Ca/Ka ratio)? C) 0.09 M methylamine
An automobile antifreeze is made using equal volumes of ethylene glycol (d = 1.114 g/mL; MM = 62.07 g/mol) and water (d = 1.00 g/mL) at 25°C. The solution has a density of 1.06 g/mL. What is the molarity of ethylene glycol in the solution
The electron in a hydrogen atom falls from an excited energy level to the ground state in two steps, causing the emission of photons with wavelengths of 2624 nm and 97.2 nm, respectively.
what is steam distillation and why is it a preferred technique to purify high boiling liquids that are water-insoluble
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