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Write an assay / paper review on the application of suspended particles or particles (solid form, liquid or gas) such as in medicine, drug delivery system.
Suppose that 0.92 of water condenses on a 85.0 block of iron that is initially at 22. If the heat released during condensation goes only to warming the iron block, what is the final temperature (in
In certain cases calcium hydroxide and sulfuric acid react to produce calcium bisulfate and water. When 0.0720 mol H2SO4 are reacted with 0.0240 mol Ca(OH)2, how much calcium bisulfate is produced?
25.0 mL of ethanol (density = 0.789 g/mL) initially at 5.4°C is mixed with 34.6 mL of water (density = 1.0 g/mL) initially at 25.3°C in an insulated beaker. Assuming that no heat is l
Hydrogen sulfide ion, HS-, is a weaker base than ammonia, NH3. When ammonia reacts with hydrosulfuric acid, H2S, what species are present in the solution in the largest amount?
The equation shows the combustion of butane (C4H10). How many moles of water can be produced by 12.5 moles of C4H10 with excess oxygen?
Fe203 is converted into metallic Fe plus H2O(g). If the residue weighs 1.774 g, what is the weight percent of Fe2O3 in the original mixture?
1.45 g sample of an iron ore is dissolved in acid and the iron obtained is fe2+ (aq). To titrate the solution, 21.6 mL of 0.102 M KMnO4(aq) is required. What is the percent of iron in the ore?
What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m? Show all of the work needed to solve this problem.
0.2 M HCl is used to neutralize 20 mL of 0.35 M NaOH. How many moles of H+ are needed to neutralize the OH-?
Calculate the wavelength in picometer of gamma ray radiation whose frequency is 9.74 × 1019 Hz. Express answer in scientific notation.
A solution is prepared by dissolving 0.11 mol of acetic acid and 0.11 mol of ammonium chloride in enough water to make 1.0 L of solution.Find the concentration of ammonia in the solution.
If 358 mL of H2SO4 is neutralized with 60.0 mL of 1.50 M NaOH, what is the initial concentration of the acid?
78 mL of 2.5 M phosphoric acid is neutralized with 500 mL of potassium hydroxide. What is the concentration of the base?
A buffer that contains .39 M base B and 0.21 M of its conjugate acid BH+ has a pH of 8.95. What is the pH after 0.002 moles of HCl are added to 0.25L of solution
When titrating 0.15 M HCl with a calcium hydroxide solution of unknown concentration, 35 mL of acid are required to neutralize 25 mL of the base.
An aqueous vinegar sample contains 4.4% acetic acid by mass and has a density of 1.006 g/mL. Calculate the amount of acetic acid in grams in 750 mL of this vinegar.
A chemist dissolves 0.9 g of an unknown monoprotic (one acidic H) acid in water. She finds that 14.6 mL of 0.426 M NaOH are required to neutralize the acid.
A 25.00-mL sample of propionic acid, CH3CH2COOH, of unknown concentration was titrated with 0.104 M KOH. The equivalence point was reached when 35.31 mL of base had been added. what is the concentra
After balancing of the equation for the reaction under basic conditions, Bi2O3(s) + OCl-(aq) --> Cl-(aq) + BiO3-(aq) what is the sum of ALL the coefficients in the equation?
The second-order reaction 2 Mn(CO)5 Mn2(CO)10, has a rate constant equal to 3.0 x 10^9 M-1 s-1 at 25°C. If the initial concentration of Mn(CO)5 is 2.0 x 10-5 M, how long will it take for 90.% o
A sample of gas is collected over water at a temperature of 35 c when the barometric pressure reading is 742 torr. What is the partial pressure of the dry gas?
The small bubbles that form on the bottom of a water pot that is being heated (before boiling) are due to dissolved air coming out of solution.Use Henry's law and the solubilities given below to cal
Methane and air in stoichiometric proportions are brought into a calorimeter at 500K. The product compositions is brought to the ambient temperature of 298K by the cooling water.The pressure in the
Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling-point constant is 5.03°C·kg/mol, and the boiling point of pure carbon tetrachloride is 76.50°C.