Answers created by Martin M.

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• Who's interested in a new Socratic on a different website?
  
• Thoughts on the recent announcement made about the future of the Socratic website? Share them here!
  
• Question #72df6
  
• What sequence of coefficients will balance the following equation? #Ca(s) + O_2(g) -> 2CaO(s)#
  
• A certain amount of rubidium iodide was dissolved in #"4.6 L"#. A #"1-L"# aliquot was extracted an diluted to #"13.9 L"# to form a #"0.65 M"# solution in water. What mass of rubidium iodide was dissolved into the original solution?
  
• Where are intermolecular forces found?
  
• What is the mass percent of the sample that was actually #"Fe"_2"O"_3#? The unbalanced reaction was #Fe_2O_3(s) -> Fe_3O_4(s) + O_2(g)#
  
• Is Gibbs energy negative?
  
• A solution has a pOH of 6.39. What is the solutions pH? (You must answer to the correct number of s.d.'s)
  
• Question #8d967
  
• Question #180fb
  
• Why is graphite a good conductor?
  
• The molar heat of fusion of iron is #14.9# kJ/mol. What is the energy (in kJ) needed to melt #4.50g# of iron?
  
• Given the reaction: #NaOH(s) + H_2O(l) -> Na^"+"(aq) + OH^"-" (aq) + 10.6 kJ#, the heat of reaction, #ΔH#, is (positive/negative), the entropy, #ΔS#, is (positive/negative) and the reaction is (spontaneous/not spontaneous). Thermochem?
  
• If the equilibrium constant (K) = 100, this reaction favors the (reactants/products) and proceeds (very little/almost to completion). Equilibrium?
  
• Question #168d2
  
• What is the number of pi bonds in the molecule below?
  
• What weight of #AgCl# will be precipitated when a solution containing #4.77#g of #NaCl# is added to a solution of #5.77g# of #AgNO_3# ?
  
• Question #b889f
  
• Question #454d0
  
• What is percentage composition of element by mass in the lithium nitride salt, #Li_3N#?
  
• What type of bonds does base-pairing in DNA involve?
  
• Question #4bc39
  
• Question #2f2a1
  
• Question #739ef
  
• What is unique about each element of the periodic table?
  
• What happens to particles when you add heat energy?
  
• What evidence supports the theory of endosymbiosis?
  
• Question #73127
  
• What is encouraging contributors to write long answers when the same thing can be explained in two to three lines?
  
• What are the resonance isomers for ozone, #O_3#?
  
• How many resonance structures can be drawn for ozone?
  
• Question #70c94
  
• Where is the activation complex? IN PICTURE
  
• Question #e7063
  
• What is the only metal that is liquid at room temperature?
  
• What happens when the temperature of a solution increases?
  
• Question #18f54
  
• Question #f6c5d
  
• What are the the body's defenses? How do they differ from each other?
  
• What is the first phase of mitosis is called?
  
• How is pollution a market failure?
  
• What is the name of the macromolecule in which phosphorus is found?
  
• Question #7c266
  
• How do you know or figure out if a chemical bond between several atoms is polar?
  
• What is the best Lewis structure below?
  
• What is the product of reacting #"Br"_2# in methanol with methylenecyclohexane?
  
• Question #8c873
  
• How do I find the specific absorptivity from the following graph?
  
• How do you convert g to mg?
  
• Question #75b0d
  
• What are the IUPAC names of the following alkanes?
  
• Question #8c83b
  
• What is the chemical equation of burning fossil fuels?
  
• What is it about our body that causes us to 'stick' to the source in case of an electric shock?
  
• How did you get to know about Socratic?
  
• Question #768bc
  
• The number 40 has how many significant figures?
  
• What is the bond called that is formed between two amino acids?
  
• What is one atmosphere of pressure?
  
• Which of the following isn't evidence that supports the endosymbiont theory? - Mitochondria and chloroplast have exterior structures similar to bacterial cell walls - The gene expression processes in these organelles are similar to the bacterial processes
  
• How does sound affect animal behavior?
  
• What is the significance of myelin on neurons?
  
• Why is a chemical synaptic transmission unidirectional? Does calcium open up Ca+ channels in the bulb and Ca+ rushes in and allows for neurotransmitters to enter?
  
• Question #a1be8
  
• Who can see my Scratchpad entries?
  
• Question #58548
  
• How could we replace non-renewable resources?
  
• Question #5da9f
  
• Why is cohesion important in biology?
  
• As the #H^+# in a solution decreases, what happens to the #OH^-#?
  
• Question #4a1f3
  
• What is the weighted average mass of chlorine?
  
• Zahra works at Forever 21. Shirts cost $15.00 and leggings cost $5.00 each. One day she sold a total of 80 shirts and leggings for a total of $700.00. How many shirts did Zahra sell?
  
• What is an mRNA codon?
  
• Is diamond an insulator? What about graphite?
  
• What is the [#OH^-#] in a solution of pH 3.00?
  
• What causes an unsaturated fatty acid to have a different shape than a saturated fatty acid?
  
• What are the main functions of phosphorus in living organisms?
  
• What are the equivalents of 0 K, 0°C, and 0°F in the other temperature scales?
  
• How does cellular respiration affect the carbon cycle?
  
• Question #65b61
  
• What is the chemical process in which smaller compounds are joined to form larger compounds, releasing water?
  
• Question #83b35
  
• How do we define life?
  
• How do you calculate the average atomic mass of rubidium if 72.17% of its atoms have a mass of 84.91 amu and 27.83% of its atoms have a mass of 86.91 amu?
  
• Question #786dc
  
• The strong nuclear force is an attractive force that binds what?
  
• Question #4cac8
  
• In most pure substances, melting occurs at a specific temperature called the what?
  
• Question #2ff54
  
• Question #ea2ce
  
• Question #7b9b5
  
• What is the difference between essential amino acids and nonessential amino acids?
  
• Question #a115b
  
• How do you evaluate #f(x)=log_10x# for x=10?
  
• A triangle has sides A, B, and C. Sides A and B are of lengths #2# and #5#, respectively, and the angle between A and B is #(5pi)/8 #. What is the length of side C?
  
• How do organelles communicate within the cell?
  
• Why is cell signaling important?
  
• How do scientists count a species' population?
  
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