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phosphorus has the molecular formula P4 and sulfur has the molecular formula S8. How many grams of phosphorus contain the same number of molecules as 6.4 g of sulfur.
30.0 mL of pure water at 280. K is mixed with 50.0 mL of pure water at 348 K. What is the final temperature of the mixture? Ignore significant figures for this problem.
How many grams of NaOH are in a 225.0 mL sample of a 2.5 M solution of NaOH? (Molar mass of NaOH is 40.0 g/mol)
compound has been analyzed and found to contain the following masses of elements: Carbon 0.2990g, hydrogen 0.05489g, nitrogen 0.2318g, and oxyen 0.1328g. calculate the tmpirical formula of the compound.
Describe the three types of models (layer sequence drawings, computer graphics, balls and sticks) used for visualizing the three dimensional structure of unit cells
If 60.0 g of H3PO4 is dissolved in enough water to form 175 mL of solution, what is the molarity (M) of the solution
If a few drops of water on the outside of the hot water syringe used to dispense the 5.00 mL sample into the calorimeter well for the Kcal determination fell into the well
Construct a molecular orbital system for the basis set as the basis set, considering linear , bent , and cyclic gemetries
Nitric acid is gernerated by the action of sulfuric acid on sodium nitrate. Nitrous acid is prepared by the action of hydrochloric acid on sodium nitrite. Why is nitrous acid prepared in situ rather than obtained from the reagent self.
Calculate the enthalpy change (in kJ) associated with the conversion of 25.0 grams of ice at -4.00°C to water vapor at 106.0°C. The specific heats of ice, water,
How many grams of nickel nitrate, Ni(NO3)2, must be dissolved to prepare 200 mL of a 0.152 M aqueous solution of the salt.
A copper cube measuring 1.60 cm on edge and an aluminum cube measuring 1.61 cm on edge are both heated to 55.3 C and submerged in 100.0 mL of water at 22.1 C.
What chemical test can I do to distinguish between succinic acid and napthoic acid? Succinic acid is a dicarboxylic acid where as napthoic
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