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After all of the metal had dissolved, the left over acid was titrated with the 0.1054M NaOH. If 24.36 mL of 0.1054M NaOH was needed to neutralize the leftover acid, explain what the atomic mass of t
A diamond which is having 5.0 x 10^21 atoms of carbon. Determine how many moles of carbon and calculate how many grams of carbon are in this diamond.
A certain radioactive element emits a gamma ray with a frequency of 1.13 x1020 Hz. Gamma rays are electromagnetic radiation of very short wavelength emitted by the nuclei of radioactive elements.
Explain what will be the result if a student extracts first with NaOH then with NaHCO3. Explain why are the acidification steps necessary after the two extractions?
Assume that you carry out an analytical procedure to generate a calibration curve. Then you analyze an unknown and find the absorbance that gives a negative concentration for the analyte. What does
Calculate the kinetic energy of an electron (in J) that is ejected from the sodium by light with a wavelength of 340 nm? Electrons are ejected from the sodium metal by any light that has a wavelengt
What is the concentration of H2S in mg/L when the hydrogen sulfide, which is extremely toxic to humans, can be detected at a concentration of 2.00 ppb and which is having the densi
Glycine is an amino acid made up of hydrogen, carbon, oxygen, and the nitrogen atoms. Combustion of a .2036 gram sample gives the 1.00 atm and.122 g of water and 132.9mL of CO2 at 25oC.
Determine the final temperature inside the calorimeter (c of copper =0.387 J/g·K)? One piece of copper jewelry at the 105°C has exactly twice the mass of another piece, which is at t
Determine the total amount of solute that will be extracted by the ether, K=1.0? An aqueous solution which is having 5.0 g of solute in the100 ml is extracted w/three 25 ml portion of diethyl ether
Find out the equivalent mass of the unknown solid acid in gram per mole of H+ if an acid sample of mass 0.730g needed 32.50 mL of 0.09486 M NaOH to neutralize where 1.05 mL of 0.1015 M HCl was used
Determine the numbers of grams of iron could be produce from the 220. Grams of Fe3O4, assume that AL is present in excess?
What is the estimated molarity of NaOH in this solution when the stock NaOH solution was prepared by dissolving the 40. g of solid NaOH in 10 L of solution.
A sample which is having .305 g of potassium hydrogen phthalate was dissolved in the 25.00 mL of distilled water. If 15.00 mL of a stock NaOH solution were needed to totally react all the p
If 2.54 grams of S are reacted with the oxygen, determine the volume of SO2 gas produced at the 30.5 degrees C and1.12 atm.
Under the same conditions of pressure and temperature, 9.56 mL of a mixture of CO and CO2 effuse through the hole in the same amount of time. In 2.00 min, 28.7 mL of He effuse through a small hol
What is the molecular weight of the unknown gas? An effusion apparatus can be used to determine molecular weights. In one experiment the effusion of CHCl3 is detected to be 10.35 min and in a
Determine the pH of the resulting solution if the 25 mL of .432Mmethylamine, CH3NH2 is added to 15 mL of .234M HCL?
48.12 g of a metal at 98.8 degrees Celsius are mixed in the same calorimeter with 50.0 mL of water at 22.0degrees Celsius. The final temperature of the mixture is 34.1degrees Celsius.
Determine the mass of zinc reacted at the 298K, 1.00atm, if 50.0mLhydrogen gas is evolved in reaction zinc with hydrochloric acid solution.
What is the half reaction for the deposition of silver if a constant electric current deposit 0.365g of silver metal in the 12960 seconds from a solution of silver nitrate which is having the
Determine the standard molar enthalpy of formation of formic acid. The standard molar enthalpy of combustion of formic acid, CH2O2 (l), to produce the carbon dioxide and water is -210.607 KJ/mol.
Identify the wavelength of the line in the spectrum of the hydrogen atom that arises from the transition of the electron from the orbital with n =5 to the orbital with n = 1?
Find out the de Broglie wavelength which is associated with a baseball that is moving with a velocity of 98 mph. A baseball weighs 220 g. Top speed for a professional pitcher is about 100 m
Determine how many grams of mixture are required to provide the 245 kJ of heat when the ammonium nitrate is an oxidizing agent and can give rise to explosive mixtures.