Chemistry

The mole is a counting number that allows scientists to describe how individual molecules and atoms react. If one mole of atoms or molecules is equal to 6.022 x 10^32 atoms or molecules, how many molecules are in 23.45 g sample of copper (II) hydroxide, Cu(OH)2? Express your answer to the correct number of significant figures. (MM of Cu(OH)2 is 97.562g/mol. Be sure to show all steps completed to arrive at the answer.
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Determine the molar solubility of AgBr in a solution containing 0.150 M NaBr. Ksp (AgBr) = 7.7 10-13.
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PLEASE HELP!! What direction do you predict the addition of a base to the solution containing bromophenol blue will drive the equilibrium? Explain your prediction in terms of Le Chtelier's principle.
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A quantity of liquid methanol, CH 3OH, is introduced into a rigid 3.00-L vessel, the vessel is sealed, and the temperature is raised to 500K. At this temperature, the methanol vaporizes and decomposes according to the reaction CH 3OH(g) CO(g) + 2 H 2(g), K c= 6.9010 2. If the concentration of H 2 in the equilibrium mixture is 0.426M, what mass of methanol was initially introduced into the vessel?
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A white rhinoceros weighs about 1,500 pounds (lb). How many tons (T) does the rhinoceros weigh? (1 T =A. 1.5 ToB. 1 TC. 0.75 TD. 0.5 T
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Al diluir 25 g de sal de mesa en 250ml de agua, En cuntos C aumenta el punto de ebullicin de la disolucin formada? ( Ke = 0,52 C/molal , PM NaCl = 58,44 g/mol)
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Oil and water do not mix. What can be said about oil? It is nonpolar. It is polar. It is saturated. It is unsaturated.
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The second law of thermodynamics predicts that heat flow from a cooler object to a hotter object:________ a) will be spontaneous at high pressure b) will be spontaneous at low pressure c) will never be spontaneous at any pressure d) will always be spontaneous
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The solubility of calcium oxalate, CaC2O4, in pure water is 4.8 105 moles per liter. Calculate the value of Ksp for silver carbonate from this data.
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For which of the following elements (in their normal, stable, forms) would it be correct to describe the bonding as involving "a sea of electrons"?a. hydrogen b. nellum c. sulfur d. Iodine e. Ethium
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What is the atomic mass for Helium (He)? Question 5 options: 8 2 3 4
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Help needed ASAP will give brainliest
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what is a chemical that is safe to use in food but in small amounts?
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When balancing redox reactions under acidic conditions, hydrogen is balanced by adding: Select the correct answer below: a. hydrogen gasb. water molecules c. hydrogen atoms d. hydrogen ions
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H2S(g) 2H2O(l)3H2(g) SO2(g) Using standard absolute entropies at 298K, calculate the entropy change for the system when 1.60 moles of H2S(g) react at standard conditions.
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Question 4 of 20:Select the best answer for the question4. Which of the following is a design theory from the 1980s that uses mathematics to guide computer-aided designO A. C-K TheoryO B. General Design TheoryO C. ASEO D. TRIZ
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What is the concentration of MgSO4 in a solution prepared by dissolving 30g MgSO4 in 500ml distilled water. Express concentration in (i)ppm(ii) %w/v(iii) %w/wAssume the solution density is 1.15g/ml.
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19. For the following unbalanced equation: S (s) O2 (g) H2O (l) ----> H2SO4 (aq) At what temperature (K) does O2 have to be if the volume of the gas is 5.01 L with a pressure of 0.860 atm to produce 17.55 grams of H2SO4
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At 25 C, only 0.0990 mol of the generic salt AB3 is soluble in 1.00 L of water. What is the Ksp of the salt at 25 C? AB3(s)A3+(aq)+3B(aq)
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By December 31, 2003, concerns over arsenic contamination had prompted the manufacturers of pressure-treated lumber to voluntarily cease producing lumber treated with CCA (chromated copper arsenate) for residential use. CCA-treated lumber has a light greenish color and was widely used to build decks, sand boxes, and playground structures.Required:Draw the Lewis structure of the arsenate ion (ASO4^3-) that yields the most favorable formal charges.
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3.490x 10^-3 + 1.100x10^-2[?]x10^[?]
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c. CaCl2 can be melted to produce calcium metal and give off chlorine gas. The equation for thisis CaCl2() Ca(s) + Cl2(g). If 277.45 g CaCl2 were melted, how many grams of Ca(s) wouldbe formed? (10 points)HELP MEEEEE PLEASE
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What happens if we put raw eggs in a pot full of hot oil?
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How are proteins carbohydrates and fats related to the discipline of chemistry
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