Chemistry Homework Help: Answers & Questions Page 70

• What are some examples of mixtures?

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• How do valence electrons determine chemical reactivity?

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• What is the formula for methanol?

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• Why are valence electrons the most important to the chemical properties of the atom?

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• Where does aldehyde functional group occur in organic compounds?

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• What is the covalent compound formula for phosphoric acid?

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• Calculate the number of moles of CH3OH in 5.00L of 2.00m solution if the density of the solution is .950 g/mL?

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• How do you calculate serial dilutions?

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• What is the oxidation state of copper in CuSO4?

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• How do you calculate the weight of ethylenediamine (en) used? (note: 30% en solution (15mL) was neutralised with 5M HCl (2.5mL), density of en also given to aid in calculation :0.90g/mL)

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• Why does the double bond in alkenes make them more reactive than alkanes, which are single-bonded?

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• How can I determine if and when a molecule has or needs a resonance structure?

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• Do epinephrine and norepinephrine exist in the body as a racemic mixture? How does the chirality of the compound affect the receptors? Do s-norepinephrine and r-norepinephrine function the same in the human body?

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• What does the atomic number tell us?

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• What is the chemical formula of tin(IV) oxide?

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• How do you calculate molar solubility and ksp?

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• Predict the relative atomic radii of the three magnesium isotopes, giving your reasons?

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• What is the sum of all the oxidation numbers in any compound?

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• State the difference between a physical change and a chemical change, and list three indications that a chemical change has occurred. Which indication is most suggestive of a chemical reaction?

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• Is BBr3 a lewis acid or base?

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• How do you calculate the vapor pressure of ethanol?

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• Does SO2 have a resonance structure?

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• How would you define second ionization energy?

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• What is the chemical formula for sugar?

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• What is the empirical formula of C2H4O2?

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• How can I find the percent compositions of Mg(NO3)2?

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• Calculate the %Br in a 1.0234g mixture of AgCl and AgBr if the mixture contains 0.6635g of Ag?

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• When iron(II) sulfate dissolves in water, does iron(II) form a complex ion with water surrounding it?

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• How does salt change the specific heat capacity of water?

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• Hybridization of carbon in ##C_2H_2##?

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• What are the two main types of chemical bonds?

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• You have 47 mL of a 0.500 M stock solution that must be diluted to 0.100 M. Assuming the volumes are additive, how much water should you add?

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• What is the ionic bond formation of Beryllium and Oxygen?

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• Calculate the density of nitrogen gas, in grams per liter, at STP?

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• What is the empirical formula for nitroglycerin?

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• How does atomic size vary in the periodic table?

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• cobalt (II) sulfate reacts with lead (II) nitrate farming cobalt (II) nitrate and lead (II) sulfate

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• What is the net ionic equation of the reaction of MgSO4 with Pb(NO3)2?

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• What is the chemical equation for the reaction of potassium oxide with sulphuric acid?

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• What element has the symbol Ag?

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• What is the equation to convert ethanol to propanoic acid ? And what conditions needed for the conversion ?

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• What are the cations and anions for the formula CuBr2?

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• How can I draw all possible stereoisomers for 2-chloro-3-hexanol?

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• Why can't Sp3 hybrid orbitals can form pi bonds?

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• How do you do flip chair conformations?

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• How would you explain an ethyl group?

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• 2B5H9(l)+ 12 O2(g)= 5B2O3(s) + 9H2O(l) Calculate the kilojoules of heat released per gram of the compound reacted with oxygen. The standard enthalpy of formations of B5H9(l), B2O3(s), and H2O(l) are 73.2, -1271.94, and -285.83 kJ/mol, respectively ?

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• The density of mercury metal is 13.6 g/mL. What is the mass of 3.55 mL of the metal?

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• When 8.4g of NaHCO3 is added to a solution of CH3COOH weighing 20g. It is observed that 4.4 g of CO2 is released into atmosphere and a residue is left behind. Calculate the mass of the residue by applying law of conservation of mass?

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• How can you tell a gas is a halogen?

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