Chemistry Homework Help: Answers & Questions Page 74

• 6.2 atm is equal to how many torr?

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• The mass of cobalt-60 in a sample is found to have decreased from 0.800g to 0.200g in a period of 10.5 years. From this information, what is the half-life of cobalt?

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• What did Rutherford's gold-foil experiment tell about the atom?

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• What is the formula for magnesium carbonate?

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• How does a solution differ from a colloid?

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• Balance the following reaction: NH4NO3 + Na3PO4 --> (NH4)3PO4 + NaNO3 If we started with 30.0 grams of ammonium nitrate and 50.0 grams of sodium phosphate, which reactant is limiting? What is the mass of each product that can be formed? What mass of t...

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• How does osmotic pressure affect solute concentration?

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• If an aerosol can contained 350mL of CFC gas at a pressure of 4.4 atm , what volume would this gas occupy at 1.0atm?

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• Write equations to show how 2,3-dimethylbutane may be prepared from each of the following compounds. (i)an alkene (ii)A grignard reagent (iii)a haloalkane (iv)a sodium alkanoate?

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• What does like dissolves like mean?

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• What is the molecular formula of ethanoic acid?

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• Discuss sacrificial protection and give two everyday examples where this method is used?

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• How do you differentiate between bases and alkali?

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• What's the final temperature in bomb calorimeter if 1.785 grams of benzoic acid (##HC7H5O2##) is combusted in a calorimeter with heat capacity of 5.02 Kj/C and initial temperature of 24.62 degree Celsius? Heat of combustion for benzoic acid is -26.42 Kj/g.

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• What is the hyphen notation of the three isotopes of hydrogen?

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• What is the bond polarity of h2s?

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• The simplest formula for butane is C2H5 and its molecular mass is about 60. What is the molecular formula of butane?

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• How do you calculate the half life of carbon 14?

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• Does the VSEPR theory predict that XeF2 is linear?

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• Why is flammability a chemical property?

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• What is the stronger base: ammonia or ethoxide ion?

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• Some CuSO4.5H20 was heated at 120C with the following results: Mass of crucible=10.00g Mass of crucible + CuSO4.5H20=14.98g Mass of crucible + recidue=13.54g. How many molecules of water of crystalization were lost? (H=1,Cu=63.5,O=16,S=32)

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• What is the hybridization of so2?

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• What is the difference between isobutane and n-butane ?

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• How can I draw metallic bonds?

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• What causes gas pressure (in terms of kinetic theory)?

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• How would you calculate the formal charge of NH3?

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• Explain.(i)Pentane is distilled off first when a liquid mixture containing pentane,heptane and nonane is heated.(ii)Hexane floats on water. (iii) cyclopentane may be easily separated from an aqueous salt solution?

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• How can a balanced chemical equation be used to write an equilibrium-constant expression?

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• Why is ionic bonding referred to as non directional?

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• 2KNO3 ----> 2KNO2 + O2 if 25g of KNO3 is heated, find: (1) What is the mass of KNO2 formed? (2) What is the volume of O2 formed at RTP?

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• What element is represented by ##[Ar]4s^2 3d^10 4p^1##?

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• How much energy is required to melt a 20.0 lb bag of ice ar 0 C? a pond of ice is equivalent to 0.4536 kg. The delta Hfusion of ice is + 6.009 KJ/mol.

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• What is the structural formula of cyclobutane?

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• What is the valence electron configuration for neon?

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• What are anomers?

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• How does kinetic molecular theory relate to absolute zero?

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• Why is naming compounds important?

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• What is an acid-base reaction?

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• If 525 mL of 0.80 M HCl solution is neutralized with 315 mL of Sr(OH)2 solution what is the molarity of the Sr(OH)2? __ HCl + __ Sr(OH)2 _x0001_ __ SrCl2 + __ H2O

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• A sample of water contains x% of ##"D"_2"O"##. Its molecular weight is ##19##. The value of x is what?

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• Based on the principle of nomenclature, can we call H2S hydrogen sulfide instead of hydrosulfic acid?

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• What is enthalpy?

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• What is the mass of one mole of water?

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• What is the difference between concentrated and dilute acid?

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• Whats's the name of repeating monomeric units of Dacron and Neoprene?

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• Hoe can i understand if there is a pi bond in ##POCl_3##?

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• What is a suspension?

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• How can I calculate the percent composition of magnesium oxide?

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• What are the periodic table trends for ionic and atomic radius?

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