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Upon reaction with excess sulfamic acid, HSO3NH2, a 0.121g sample of a mixture of sodium nitrite, NaNO2, and sodium chloride, NaCl, produced 28.3 mL of nitrogen gas collected over water at 25.3 degrees Celsius and at a barometric pressure of 738 mmHg. Determine the percent by mass of NaNO2 in the original sample
one hundred grams of water is saturated with NH4CLat 50 degrees C. According to table G, if the temperature is lowered to 10 degrees , what is the total amount of NH4CL that will precipitate?
A mixture of Ne and Ar gases at 347 K contains twice as many moles of Ne as of Ar and has a total mass of 52.0 g. If the density of the mixture is 3.86 g/L, what is the partial pressure (in atm) of Ne?
Calculate the pH of the resultant mixtures: a. 10 ml of 0.2 M Ca(OH)2 + 25 ml of 0.1 M HCL b. 10 ml of 0.01 M H2SO4 + 10 ml of 0.01 M Ca(OH)2 c. 10 ml of 0.1 M H2SO4 + 10 ml of 0.1 M KOH
S8 also known as orthorhombic sulfur, what type of chemical bonds does S8 have? what type of crystal is this?
An aqueous solution containing 34.1 g of an unknown molecular (nonelectrolyte) compound in 141.3 g of water was found to have a freezing point of -1.5 degrees C. Calculate the molar mass of the unknown compound.
Explain how to correct for the partial of water vapor when calculating the partial pressure of a dry gas is collected over water?
Starting with 2-methyl-1,3-cyclohexanedione and other appropriate reagents, provide a mechanism for a Robinson annulation reaction.
A litre of solution containing 0.1 M of CH3COOH and 0.1 M of CH3COONa provides a buffer of pH 4.74 . calculate the pH of a solution after the addition of 0.02 M of NaOH .
A 0.0560-g quantity of acetic acid is dissolved in enough water to make 50.0 mL of solution. Calculate the concentrations of H+, CH3COO-, and CH3COOH at equilibrium. (Ka for acetic acid = 1.8 x 10^-5).
Consider the two diagrams showing the energies (boxes) of each of four A particles and four B particles shown below. The dotted lines represent the allowed energies of each particle.
Iron(III) in water reacts with Hydrochloric acid B. Iron(III) in water reacts with Ammonium Hydroxide Then identify the geometry of the iron(III) complex in water and the complex ions produced in the above reactions
The minimum energy needed to eject an electron from a sodium atom is 4.41 * 10^-19 J What is the maximum wavelength of light, in nanometers, that will show a photoelectric effect with sodium
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