Answers created by Alfredo T.

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• According to the periodic table , a single carbon has a mass of 12.011 amu. what is the mass of a single carbon atom in grams?
  
• Does a precipitate form when a solution of potassium sulfide and a solution of calcium chloride are mixed together? If so, what is the net ionic reaction?
  
• Use the definition of ΔU to find the molar change in internal energy for the formation of urea?
  
• Question #93356
  
• In the synthesis of aspirin: Why acetic anhydride is used instead of acetic acid?
  
• #20*cm^3# volumes EACH of carbon monoxide and oxygen gas are combined and combusted. What volume of gas remains AFTER the reaction?
  
• Whats the difference between an element, molecule, atom and compound?
  
• Question #ddb20
  
• Question #f3813
  
• Question #ddc63
  
• Question #708e2
  
• Question #14fe2
  
• Question #00419
  
• Can you put a higher reaction coefficient when balancing equations?
  
• Question #e2b05
  
• What are 3 sources of error that would account for differences in measurement of the same thing?
  
• Question #fb753
  
• What molar quantity is present in a #0.5*mL# of #5.0*mol*L^-1# acetic acid?
  
• How do you determine the pH of citric acid?
  
• Question #1cf45
  
• Question #85d36
  
• Question #25b19
  
• What term can be used to label the chemical change sodium cation undergoes after dissolving in water?
  
• Question #67212
  
• For the reaction represented by the equation #Cl_2 + 2KBr -> 2KCl + Br_2#, how many grams of potassium chloride can be produced from 300. g each of chlorine and potassium bromide?
  
• Question #fef12
  
• What is a volatile buffer?
  
• Question #950bd
  
• Question #566d2
  
• Question #2c065
  
• Question #5e10c
  
• How come an atom cannot have a permanent dipole moment?
  
• Question #43a9c
  
• Question #79600
  
• Question #6d6af
  
• Why can only two electrons occupy each orbital?
  
• Question #3d2dd
  
• Question #f3b97
  
• Question #d725a
  
• Question #1f4c4
  
• What is bond angle of SiO2?
  
• Question #646eb
  
• What mass of #KC_2H_3O_2# is produced when 10.0 L #CO_2# is produced from potassium carbonate and excess acetic acid?
  
• What is an oxyacid?
  
• Question #14bf7
  
• 10.00mg of a substance yields 11.53mg H2O and 28.16mg CO2. What is the empirical formula of menthol? This is so confusing, help would be much appreciated!?
  
• Question #0c82b
  
• Does a double replacement reaction involve an exchange of bonds between compounds?
  
• Why is Hess's law true?
  
• What kind of complexes does #"Mo"^(+3)# typically form?
  
• Question #5ab95
  
• Question #d310d
  
• Question #47b4c
  
• Question #962e0
  
• What are some common mistakes students make with Arrhenius acids?
  
• Question #3d17d
  
• Question #fabcb
  
• If a chemical reaction occurs at the rate of 2.25 x 10^-2 moles per liter per second, what is the rate in moles per liter per minute?
  
• Question #67212
  
• Question #52fdb
  
• How does intensity affect the photoelectric effect?
  
• Question #7ec46
  
• Question #15440
  
• If a gas effuses #1.89# times as fast as #"COCl"_2(g)#, what is its molar mass?
  
• Question #e9418
  
• Question #46b0b
  
• Question #5be33
  
• Is electrostatic same as static electricity?
  
• Question #da032
  
• Identify the substance oxidized, the substance reduced, the oxidizing agent, and the reducing agent? 2HNO3 + 3H3AsO3 -----> 2NO + 3H3AsO4 + H2O
  
• What is the name for #P_2O_5#?
  
• What factors describe why ionic compounds are supposedly soluble in any polar solvent?
  
• Question #9c6b9
  
• Question #2a41e
  
• How many liters of 20% alcohol solution should be added to 40 liters of a 50% alcohol solution to make a 30% solution?
  
• How can a chemical formula be experimentally determined?
  
• How can I calculate the molar volume of Hydrogen gas?
  
• How can I understand Hess's law step by step?
  
• How do ionization and dissociation differ?
  
• How do you find the ground state electron configuration of an element?
  
• Why is the electromagnetic spectrum continuous?
  
• How does polarity affect bond angles?
  
• How was Le Chatelier's principle used to determine the extinction coefficient?
  
• Is covalent bond formation endothermic?
  
• Does Zeff increase, decrease or stay the same for transition metals in a row?
  
• Is osmolality preferred over osmolarity?
  
• Why is the electromagnetic spectrum important?
  
• What is an example of an Avogadro's law practice problem?
  
• What is the relationship between Boyle's law and the kinetic theory?
  
• How are hydrogen bonds related to cohesion?
  
• How does changing the units of measurement affect correlation?
  
• How does a gas expand according to the kinetic molecular theory?
  
• What are some common mistakes students make with non-spontaneous processes?
  
• How can I calculate the percent composition of magnesium oxide?
  
• Is the following acid-base reaction Arrhenius, Bronsted-Lowry, or Lewis: AlCl3 + Cl --> AlCl4-
  
• Why are chemical reactions reversible?
  
• How do endothermic reactions absorb heat?
  
• Why do endothermic reactions happen?
  
• How do you find the atomic mass of an element?
  
• Why are covalent bonds insoluble in water?
  
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