Answers edited by Doc048

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• Assuming #"Ba"("OH")_2# dissociates completely, what is the #"pH"# of #"0.015 M"# #"Ba"("OH")_2# to three sig figs?
  
• Question #82ddc
  
• Question #b2438
  
• Question #a6b05
  
• What is the volume of 5.0 grams of #CO_2# at STP?
  
• Question #eded3
  
• Question #5ecc9
  
• What are the quantum numbers for Bromine?
  
• How do you arrange #NH_4^+, BF_3, H_2O, C_2H_2#, in increasing order of bond angle?
  
• A compound is found to consist of 63% manganese and 37% oxygen by mass. What is the empirical formula?
  
• Question #fe00e
  
• The molar heat of fusion for water is 6.01 J/mol. How much energy must be added to a 75.0-g block of ice at 0°C to change it to a 75.0 g of liquid water at 0°C?
  
• Question #0ce76
  
• What is the empirical formula for a compound which contains 0.0134 g of iron, 0.00769 g of sulfur and 0.0115 g of oxygen?
  
• How do you determine the binding energy of lithium-6?
  
• Question #e175e
  
• Can the Henderson-Hasselbalch equation be used to estimate the pH values at the equivalence point?
  
• Question #4bc86
  
• Use this balanced equation #2C_2H_2 + 5O_2 -> 4CO_2 + 2H2_O + 2599 kJ#. How much energy is needed to produce 42.9 grams of carbon dioxide?
  
• Is #CaCO_3# acidic, basic, or neutral?
  
• Question #f228f
  
• The standard heat of formation of Fe2O3(s) is 824.2kJ/mol. Calculate heat change for the reaction 4Fe(s)+3O2(g)=2Fe2O3(s)?
  
• How do you calculate boiling point at different pressures?
  
• Question #56e71
  
• What represents the area in an atom where an electron most likely will be found?
  
• Question #c2852
  
• How do you determine which orbitals are used in hybridization?
  
• What is the order for the reaction #2"N"_2"O"_5(g) -> 4"NO"_2(g) + "O"_2(g)#?
  
• What is the conjugate base of #HNO_2#?
  
• Question #d3d97
  
• If #14*g# of ammonia was isolated from a reaction between #N_2#, and #H_2#, what is the percentage yield?
  
• What is the final temperature when 50 mL of water at 80°C are added to 25 mL of water at 25°C?
  
• How would you explain the collision theory?
  
• Given #K_"sp"# #ZnCO_3=1.46xx10^-10#, what is the #"ppm"# concentration of a saturated solution?
  
• What are the products for this reaction: NaOH + Na2S ?
  
• Question #effe3
  
• Question #01511
  
• Question #005a0
  
• Q.)(i) How many moles of sulphur will be produced when 2 moles of H2S reacts with 11.2L of SO2at NTP?
  
• How does concentration affect galvanic cell?
  
• In the equation: #A + B -> C+D#, what are A and B?
  
• #N_2 + 3H_2 -> 2NH_3#. What is the limiting reactant if you start the reaction with 10.0 moles of each reactant?
  
• Question #2de37
  
• Question #b844d
  
• Can the Henderson-Hasselbalch equation be used to estimate the pH values at the equivalence point?
  
• What is the Ksp equation?
  
• What is meant by a stress on a reaction at equilibrium?
  
• What information does the chemical equation #2C_4 H _10+13O_2 -> 8CO_2 + 10H_2 O# provide?
  
• Question #b2f7a
  
• Question #66d23
  
• #CO_2# gas, in the dry state, may be produced by heating calcium carbonate. #CaCO_3 (s)DeltaCaO(s) + CO_2(g)#. What volume of #CO_2#, collected dry at 55 C and a pressure of 774 torr, is produced by complete thermal decomposition of 10.0 g of #CaCO_3#?
  
• How do we balance the oxidation of chloride anion to give chlorine gas by potassium permanganate?
  
• At a pressure 47 kPa, the gas in a cylinder has a volume of 12 liters. Assuming temperature remains the same, if the volume of the gas is decreased to 8 liters, what is the new pressure?
  
• Question #471de
  
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