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Calcium carbonate which is having 1.0 g reacts with 1.0 mL of a 6.0M nitric acid solution inside a sealed 1.0L container having the air (80% N2, 20%02). Determine the total and partial pres
If 10% of that light shines on your chemistry text, determine the numbers of photons per second shine on the book from a 75-watt bulb? Electric power is typically stated in units of watts (1watt = 1
Calculate an aromatic hydrocarbon? Explain how can you recognize an aromatic compound from its structure?
What sugar is formed when the starch is digested? Explain what type of chemicals reaction is involved? Explain how does the dichromate-chromate equilibrium depend on the Hydrogen ions?
Determine the emergency contraceptives? How do they work and calculate a local anesthetic? Explain what an antagonist is and what structural feature is shared by all the tetra cyclones?
At a beginning concentration when the dinitrogen peroxide is placed in a flask which is having 1.0 M at 298 K and allowed to come to equilibrium with nitrogen dioxide according to the reaction
A 1.00 u g sample of a radioactive material contains 6.0x1014 nuclei. After 48 hrs 0.25 ug of the material remains. Determine the half life of the material?
How can calculate the pH of a solution of when it is having 0.01MHNO3 How can determine the concentration of hydroxide ion at PH 10
Assume the acidity observed in the human gastric juice is totally due to the presence of hydrochloric acid (HCl). If the observed pH in the gastric juice is equal to 2.00
A aqueous solution which is having a 250 ml M contains the 1.560 gm of ammonium chloride (NH4Cl) pKb of NH4OH is 4.757
If the pKa value of benzoic acid is 4.2 determine the resulting pH when a pharmacy student prepared an acidic buffer solution containing the equal concentrations of benzoic acid and the
Discuss in terms the valance bond theory and the electron configuration why it is possible to have a PH5 molecule but not a NH5?
Explain how the bonds form between Sulfur (S) and each Fluorine (F) atom in SF6 by using the valence bond theory to how to combine all the promoted electrons into a hybrid.
Determine the number of molecules in anagrams gel electrophoresis band which has.05 micrograms of a1000 bp fragment of the DNA. There are 660g/mol/bp where the Avogadro's number is 6.02 x 10^23.
Explain how would you calculate the exact number of cells in one mL of culture? There are approximately 10^9 cells/ mL in a culture of E. coli cells grown overnight.
Discuss why is it important to isolate single colonies and to use only the isolated colonies in this experiment and in biotechnology in general when the cells that are used in the plasmid prep lab
Water in contact with air is acidic, rather than neutral, due to dissolve the carbon dioxide. Water in equilibrium with air contains 4.4 x 10-5% CO2.
Determine the entropy change of the substance associated with the freezing process (in J/mole/K, with three significant figures). A certain amount of heat, 5.21 kJ, is released during the
What are the hydronium ion concentration and the pH of the solution when a student prepared a 0.10 M solution of acetic acid, CH3COOH and the acetic acid has a Ka of 1.75 x10-5.
What was the concentration of the hydrochloric acid when a titration was performed on the 50.0 mL of 0.250 M NaOH. After the addition of 71.4 mL of HCl, the phenolphthalein indicator changed from t
Write down a balanced equation for the reaction of the calcium hydroxide, Ca(OH)2, with phosphoric acid, H3PO4, producing the water, H2O and the calcium phosphate, Ca3(PO4)2.
Determine the number of moles in the 17.7 grams of the compound. Determine the empirical formula for this compound?
What is the formula of metal chloride if a metal chloride containing 65.74% of Chlorine? Specific heat of metal is 0.115 where 400cc of the vapor of metal chloride at NTP has the weight of 5.8gm.
Demonstrate a correct numerical setup for calculating the number of moles of Mg(OH)2(gram -formula mass = 58.3 grams/mole) in an 8.40 gram sample.
Calculate the formulas for the insoluble precipitates produced when the sodium hydroxide reacts with Copper (II) ion, Iron (III) ion, and Lead (II) ion?