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Suppose .80 g of a gas occupies 295 mL at 25c and 680 mmHg of pressure, explain what is the molar mass of the gas?
Determine the lime (CaO) and soda ash (Na2CO3) dose, mg/L as CaCO3, to soften the following water to a final hardness of 90.0 mg/L as CaCO3. Assume the lime is 90% pure and the soda ash is 97% pure.
Show how the following compounds could be synthesized from benzene a. benzoic acid b. aniline c. m-chloroenzenesulfonic acid d. m-chloroethylbenzene e. m-brombenzonitrile f. benzyl methyl ether g
the mass of an average blueberry is 0.78 g and the mass of an automobile is 2100 kg. find the number of automobiles
0 .15m h2CO3 and 0.80 m of NaHCO3 are dissolved what is the ph of resulting solution
what metal cations form sulfide precipitates in basic solution in qual scheme after the above cations have been removed. Qualitativley explain, why the pH of the sulifide solution effects which cations precipitate.
Calculate the concentration of I- in a solution obtained by shaking 0.20M KI with an excess of AgCl. the answer is not 9.23*10^-9
What volume (in mL) of 0.177 M CsI solution is required to react exactly with 34.9 mL of 0.118 M Cl2 solution according to the following reaction
The molarity of Ca2+ in a saturated solution of CaCO3 was determined to be 0.0000616 M. Calculate the solubility product constant (Ksp) for CaCO3. CaCO3 (s) Ca2+ (aq) + CO32- (aq) Molar Mass (g/mol) CaCO3 100.09
As a technician in a large pharmaceutical research firm, you need to produce 400 mL of 1.00 M potassium phosphate buffer solution of pH = 7.29. The pKa of H_2PO_4^- is 7.21.
What is the millimolar concentration of dissolved oxygen for a lake or stream under the partial pressure of oxygen and a temperature of 12?
Approach the tank slowly and carefully carrying full face mask with portable oxygen. The characteristic odor will be evident if leaking then put on the PPE.
For the following please provide the # of bonding domains, # of nonbonding domains, polarity, intermolecular attractive forces, and which IMAF is the most important.
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