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a 2.2 g sample of an unknown acid with an empirical formula of C3H4O3 is dissolved in 1 L of water. it requires a 25 mL of .5 M NaOH to completely neutralize the acid. assuming the unknown acid has one acidic proton per molecule, what is the molecular formula of the unknown acid?
If the actual yield is 220.0 g and the theoretical yield is 275.6 g then what will be the percent yield of ferrous sulfide.
Consider H2, D2, and H20, treated as ideal gases at pressures of 1 atm and temperatures of 293.2 K.
One mechanism of fragmentation is loss of a neutral radical by cleavage of a bond from which one electron lost. What is the m/z ratio of the most stable cationic fragment that can be generated from dexchlorpheniramine by this mechanism?
Determine the molar concentration of chloride ions after adding 225 ml of 0.625 MKCL with 615 ml of 0.385M MgCl2 if final volume of the solution is 840ml.
Suppose that a sample of gas occupies 192 mL of volume at 25C and a pressure of 206 torr. What would be the volume if the pressure were changed to 506 torr at 25C.
The "Zebra" cell was invented in 1985 in South Africa as part of the "ZEolite Battery Research Africa" project, and is used in all-electric municipal buses and other vehicles.
A piece of galena has a volume of 5.4 cm3. If the density of galena is 7.5 g/cm3, what is the mass (in kg) of that piece of galena?
The vapor pressure of pure CH2Cl2 (with molecular weight 85 g/mol) is 133 torr at 0?C and the vapor pressure of pure CH2Br2 (with molecular weight 174 g/mol) is 11 torr at the same temperature.
A 1.20 sample of dry ice is added to a 745 mL flask containing nitrogen gas at a temperature of 25.0 C and a pressure of 735mmHg .
A 255-mL sample of HCl solution reacts with excess Mg to produce 14.0 L H2 gas at STP. What is the molarity of the HCl solution?
write a balanced equation for the reaction that occurs between the solutes. Calculate the concentration of each remaining ion in solution. Is the resultant solution acidic or basic
What is the new boiling point of water if you add 188 grams of magnesium chloride to 1250 g of water.
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