Chemistry Homework Help: Answers & Questions Page 47

• What is the molar mass of helium in kg/mol?

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• predict the products and write a balanced equation NiCl2(aq)+NaOH(aq)→−−−+−−−?

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• Convert 73.2 ppm to weight percent So what exactly is ppm and weight percent gland how would we approach and solve this problem?

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• What is vsepr theory based on?

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• Why does the anode carry the negative charge in galvanic cell but positive charge in electrolytic cell?

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• How Do I form IF5 in the Lewis Theorie to develop it with the VSEPR?

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• 300 mL of 0.50 M HClO + 400 mL of 0.50m NaClO. How do I setup an ICE table for this? What is its net ionic reaction?

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• Silicon tetrachloride (##SiCl_4##) can be prepared by heating ##Si## in chlorine gas: ##Si (s) + 2Cl_2(g) -> SiCl_4(l)##. In one reaction, 0.507 mole of ##SiCl_4## is produced. How many moles of molecular chlorine were used in the reaction?

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• How is naming a polyatomic ion different from naming a binary compound?

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• How much is 23-kg in pounds?

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• Chlorine consist of two isotopes one is cl-35 which has the mass of 34.97 and natural abundance of 75.77% the second is cl -37 the mass of 36.96 and natural abundance of 24.2% calculate the average mass of chlorine?

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• Using the reaction 2Na(s)+Cl2---> 2NaCl(s), determine the mass of NaCl that is produced when a mixture of 12.8g Na and 10.2g Cl2 reacts? Determine the limiting reactant first

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• What is an example of a heterogeneous mixture?

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• What is Hund's Rule?

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• The systematic (IUPAC) name for the amino acid threonine is (2S,3R)-2-amino-3-hydroxybutanoic acid. The systematic name indicates that threonine has two stereocenters, at positions 2 and 3, with S and R configurations, respectively. What is ths the Fischer...

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• How do you convert 28.0 centimeters to meters with the correct number of significant figures? And how do you convert 1000 meters to kilometers with the correct number of significant figures?

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• What is the valency of alkaline earth metal?

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• How to draw lewis structure NH3?

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• An aqueous solution of lead II phosphate is added to an aqueous solution of potassium iodide. When the two colorless solutions mix, a bright yellow precipitate forms in a double replacement reaction. What is the balanced chemical equation?

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• ##CaCO3 + 2HCl -> CaCl2 + H2O + CO2## If it takes 0.0456 mol ##HCl## to completely react with all the ##CaCO3## in a 2.50g eggshell sample, a.) What is the mass of ##CaCO3## in the eggshell sample? b.) % ##CaCO3## in the eggshell sample?

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• Why is the periodic table organized by atomic number rather than alphabetically?

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• What is the principal quantum number for the outermost electrons in a Ca atom in the ground state?

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• What is the simplest formula for chromium (II) and selenide?

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• What volume of 0.255 M K2S solution is required to completely react with 170 mL of 0.110 M Co(NO3)2?

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• What is the formula for magnesium iodide?

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• How do you write an equation to represent "Calcium sulfite decomposes to form calcium oxide and sulfur dioxide"?

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• Do both elimination reactions, E1 and E2, follow Zaitsev’s rule?

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• Converting centiliters to nanoliters: can you please explain the process of this? 35.7cL = ?nL

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• Why are strong acids and bases also strong electrolytes?

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• What is a chromophore?

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• What is the valence electron configuration for chlorine?

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• How would you explain the phase diagram of sulphur?

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• Can anyone explain to me how to identify epimers and anomers in carbohydrates (sugars)? Also, state examples.

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• How many chiral centers are there in cholesterol?

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• Can I separate acetic anhydride from asprin?

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• What is the difference between matter and substance?

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• The Ksp for Zn(OH)2 is 5.0x10^-17 . Determine the molar solubility of zn(OH)2 in a buffer solution with pH of 11.5 ?

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• Explain the functions of the parts of a cathode ray tube?

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• How many moles of chloride ions, Cl- , are there in 0.50g of copper(II) chloride, CuCl2?

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• What is the definition of the latent heat of fusion?

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• 500 mL of hydrogen at 27°C and 3 atmospheres pressure is compressed to 100 mL at 100°C. What is the new pressure in atmospheres?

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• What does Ammonium phosphate + Barium acetate yield?

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• What does the "2, 3" part of this compound mean? 2,3-dimethylbutane.

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• If a point is below the curve on a solubility chart, than it is saturated or unsaturated?

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• A track runner ran exactly 400 meters in 45.23 seconds. what was the average speed in miles per hour?

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• Fe(26) has eight(8) valence electrons, but it's valency is 2 and 3. How can I calculate this?

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• Why lead chloride is soluble in hot water but not in cold water?

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• What is the definition of pH?

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• How do you balance a single replacement reaction?

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• All atoms of a given element contain the same number of protons and the same number of neutrons?

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