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Ammonium sulfide in solid form decomposes to ammonia gas and hydrogen sulfide gas. It is a reversible reaction The Kp at 25 degrees C is .109 In an experiment Ammonia gas and hydrogen sulfide gas each have a partial pressure of .5 atmospheres and are introduced into a 1 liter vessel. Calculate the number of moles of solid NH4HS that is present when equilibrium is established.
How many mL of 36 % (g/g) HCl should be diluted to 1.0 L to make a 6.0 M HCl solution? The density of 36% HCl is 1.18 g/mL.
The assay for Xase has just been worked out, and you have a preparation of cells rich in this enzyme. Given the required equipment and supplies, how would you proceed
Codeine is added to 100ml of water until the solution concentration is 0.800M. What is the pH of this solution?
In the reaction of sodium benzoate with hydrochloric acid to form benzoic acid, if 1.53 g of benzoic acid were formed, how many mmol of sodium benzoate
How many grams of sucrose, C12H22O11, must be dissolved in 750. mL of water to prepare a 0.250 molal solution?
How many mL of a 0.8 M NaOH(aq) solution are required to make 500 mL of a solution with pH=12.50?
Some chemists believe that satisfaction of the octet rule should be the top criterion for choosing the dominant Lewis structure of a molecule or ion.
An aqueous solution has a vapor pressure of 84.0 at 50 . The vapor pressure of pure water at this temperature is 92.6 . What is the concentration of in mass percent?
if the half life of a certain radioactive element is 1,250 years what is the percent of atoms remaining after 7,500 years is ?
Identify the molecullar forces present in H2S nd SeO3?
If a solution is made of naphthalene in heptane and has a vapor pressure of 82 torr, what is the mole fraction of naphthalene? Assume ideal solution behavior.
How long would it take for a radioactive isotope with a half life of 2 weeks to lose at least 70% of its radioactivity? Describe two clinical uses of Radioactivity.
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