Chemistry Homework Help: Answers & Questions Page 56

• PbI2 is: PbI2(s) ⇌ Pb2+(aq) + 2I–(aq) At a particular temperature, the concentration of lead ions in a saturated solution of lead iodide was found to be 2.02×10−3 M What is the solubility of lead iodide expressed as mol/L' molar solubility'?

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• Calculate the molar concentration of 63.0 g of MgBr2 in 150.0 mL of solution?

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• What is the condensed structural formula for 2, 2-dimethylbutane?

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• How do you calculate electrochemical cell potential?

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• What is the formula for potassium sulfite?

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• What is the ionic formula for potassium iodide?

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• How many hybrid orbitals are present in the molecule PCl5?

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• What main peaks should be seen in the IR spectrum the methyl benzoate???

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• If the caffeine concentration in a particular brand of soda is 2.75mg/oz, drinking how many cans of soda would be lethal? assume 10.0g of caffeine is a lethal dose, and there are 12oz in a can.

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• Why is photosynthesis an endothermic reaction?

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• What is plasma?

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• What is the full ground state electron configuration of ##O^+##?

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• What is the covalent bond formation of methane?

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• Give a balanced equation for the reaction of C3H6 with bromine and state one observation that can be made during the reaction?

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• Why isn't ##H_2O_2## (hydrogen peroxide) called dihydrogen dioxide?

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• If an atom loses an electron, why doesn't its proton in the nucleus repel the charge and fall apart?

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• How do you find density in the ideal gas law?

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• How do you convert 6.59 kL to L?

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• What is the formal charge for the Phosphate Ion?

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• What is the excited state of an atom?

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• When 3-iodo-3-ethylpentane is treated with sodium methoxide in methanol, what is the major organic product? and through what mechanism is it generated?

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• Why is ammonia a nucleophile?

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• Anything that has mass and occupies space is called what?

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• What determines osmotic pressure?

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• What are some examples of synthesis reactions?

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• What is the difference between accuracy & precision? a. An example on a measurement that is accurate but not precise b. An example on a measurement that is precise but not accurate.

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• How does the modern refrigerator take advantage of the gas laws to remove heat from a system?

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• Why was J.J. Thomson wrong?

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• Why could Bohr’s model be called a planetary model of the atom?

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• What is the atomic number of carbon?

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• How chemical compound forms?what is a molecule ?

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• Determine the geometries using vsepr theory .State the approximate bond angle(s) in each molecule and determine whether each molecule is polar or non polar a)BCl3 b)PCl5 c)NCl3 d)SO3 e)XeF4 f)HBF2?

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• What is the pH of salt and vinegar?

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• Upon decomposition, one sample of magnesium fluoride produced 1.64 kg of magnesium and 2.56 kg of fluorine. A second sample produced 1.29 kg of magnesium. How much fluorine (in grams) did the sample produce?

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• How are temperature on Celsius and Kelvin scales related?

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• 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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