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Calculate the number of moles containing each of the following. Express your answer to three significant figures and include the appropriate units. A.) 1.42×1022 atoms of sodium, {\rm Na} . B.)3.23×1023 molecules of dinitrogen trioxide, {\rm N}_{2}{\rm O}_{3} C.) 7.59×1024 formula units of sodium nitrite, {\rm NaNO}_{2} .
Originally, 1.0 mL Hydrochloric acid is added to 1.0g of an unknown amine and 28 mL water in the first step of the Synthesis of Acetamides. If we added 3X the amount of hydrochloric acid instead, why would there be no product?
The density of aluminum is 2.702 g/cm3. What is the final liquid level of water if 1.130 ounces (oz) of aluminum is dropped into a graduated cylinder containing
A. tetrahedral B. square planar C. square pyramidal D. trigonal bipyramidal E.octahedral F. T-shaped G. see-saw, butterfly, or unsymmetrical tetrahedron
When H2 gas is formed from naturally occurring hydrogen, what percentages of the molecules have molecular weights of approximately
2H2S (g) + 3O2 (g) → 2H2O (g) + 2SO2 (g) If 3.50 G Of H2S Are Used In The Above Reaction, What Will Be The Theoretical Yield Of Water In Grams?
A large flask with a volume of 936 mL is evacuated and found to have a mass of 134.66g. It is then filled to a pressure of 0.967atm at 31 degrees C with a gas of unknown molar mass and then reweighed to give a new mass of 153.81g. What is the mola..
Water (H2O) methyl alcohol (CH3OH ethyl alcohol (CH3CH2OH), ethylene glycol (HOCH2CH2OH), and sucrose (C12H22O11) are commonly classified as
A buffer is prepared by adding 1.00 L of 1.0 M HCl to 750 mL of 1.5 M NaHCOO. What is the pH of this buffer? Ka = 1.7 × 10-4
The "colbalt treatments" used in medicine for arresting certain types of cancer rely upon the ability of gamma rays to destroy canercous tissues. Cobalt-60 decays with the emission of Beta particles and gamma rays, with a half life of 5.27 years. ..
Sodium lauryl sulfate can be prepared by replacing chlorosulfonic acid with another reagent. What could be used? Show the equations.
What is the final river temperature downstream? Assume that the density of the waste stream is 1000 kg/m3.
alkaline earth metal hydroxide to be used as a strong base or good source of hydroxide ion in aqueous solution for practical operation, which one would you use? Please explain why.
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