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Use your knowledge of freezing point depression to calculate an approximate mass of sodium chloride required to prepare a mixture which is having the 725.0 grams of ice slush at the -10.0 oC
The procedures for producing the crystal were: add KOH to Al metal, which dissolves the Al metal. Add sulfuric acid. Solid Al(OH)3will precipitate and then dissolve as more acid is added. Crystals gr
Identify the H+ ion concentration of the resulting solution. What will be the new H+ concentration if 6 ml of 1 M HCl is further added to it.
A solution is prepared by mixing the 2.17 grams of an unknown non-electrolyte with the 225.0 grams of chloroform. The freezing point of the mixture is -64.10oC, while the freezing point of pure chlo
An unknown alcohol is analyzed by freezing point depression. The unknown is either ethanol ( C2H5OH ) methanol ( CH3OH ) , or propanol ( C3H7OH ).
A concentrated solution of hydrochloric acid is 38.0% hydrogen chloride and has a density of 1.19 g/mL what volume of this acid would you dilute with water to prepare 8.00mL of 0.100mol.L-1 hy
Dissolving the 3.00g of an impure sample of calcium carbonate in hydrochloric acid produced 0.656L of carbon dioxide calculated at the 296K and 792mmHg Determine the percent by mass of calc
A log is known to be either oak or pine. It displaces 2.7gal of water and weighs 19.8lbs. Is the log oak or pine? Which is having the density of oak=0.9g/cm^3; density of pine=0.4g/cm^3, Have to use
Calculate the difference between the aldehydes and ketones? Explain what are the different test to determine this compounds and the principle behind?
Determine the numbers of molecules of water of hydration are present in the 630mg of oxalic acid (H2C2O4 .2H2O)
Determine the purpose of washing the crude product with saturated sodium carbonate? Could dilute sodium hydroxide be used instead of the sodium carbonate?
Determine the reaction for the formation of an ester from n-botanic acid and isopropyl alcohol with an acid catalyst present by using the structural formulas?
Elements within the same group tend to form compounds with similar formulas. An element E in Period 3 forms the following ionic compounds: E2O3 and EBr3. Determine the element E and to which group d
Write down the chemical equation for the Diels-Alder reaction of anthracite with malefic anhydride, showing structures of the reactants and the product.
When hydrazine (N2H4) reacts with nitrogen gas, hydrogen peroxide and the water are formed. Write down a balanced reaction and calculate delta H for the reaction from the following thermo chemical d
Determine the number of grams of alcohol present in 1.00 L of 48 proof gin. The density of ethanol is 0.798g/mL. The alcohol content of hard liquor is normally given in terms of the "proof,
Antarctica, almost totally covered in the ice, has an area of 5,500,000 mi2 with an average height of 7500 ft. Without the ice, the height would only be 1500ft. calculate the mass of th
What will happen if you then raise the pH by adding aqueous NaOH when you lower the pH of a solution containing aqueous sodium benzoate, precipitate eventually forms.
The water solubility of sodium oxalate and oxalic acid at room temperature are 3.7 4/100 mL and 10 g/100mL, respectively. Could you prepare oxalic acid by adding HCL to a solution of sodium oxalate,
Determine how many milliliters of 0.0500 M KMnO4 would be required for the reaction of 5.00 ml 0.185 M H2C2O4?
What is the molar concentration of AgNO3 in the solution when a student dissolves 0.3000 g AgNO3 (169.88 g/mol) and dilutes it to precisely 250.0 ml.
Calculate how many orbital are completely filled in an atom with the electron configuration of 1S2, 2S2, 2P6, and 3S1?
If you place 2.05 g of aluminum in a beaker with 185 mL of1.35 M KOH, will any aluminum remain (show all calculations). What mass of KAl (OH)4 is formed?
The boiling point of pure benzene is 80.10 o C, whereas the solution has a boiling point of 80.34 oC. Anthracene, a hydrocarbon obtained from coal, has an empirical formula of C7H5.
Calculate the osmotic pressure of human blood at 37 C. Assume the blood is isotonic with a 0.16 M NaCl solution, and assume the van't Hoff factor i is 1.9 for NaCl.