Questions asked by Sera

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• What arrangement of paths would make a circuit not light? For example, where can you NOT place wires in order to keep the circuit working.
  
• What is a fail-safe method you can use to find reasoning for a step in a two-column proof if you're not sure of what answer to give?
  
• I have the answer key for this but I need a walkthrough. The balanced equation for calcium carbonate into lime is: CaCO3 + heat ----> CaO + CO2 How many grams of calcium carbonate must be decomposed to produce 5.0 L of carbon dioxide gas at STP?
  
• What steps and formulas would you use to solve the question "At what Kelvin temperature will a sample of gas occupy 12 liters if the same sample occupies 8 liters at 27 °C?"
  
• What are the standard temperature (in Kelvin) and pressure (in atm.) conditions for gas measurements?
  
• What volume do one mol and three mol of gas occupy at STP?
  
• A rigid plastic container holds 1.00 L methane gas at 650 torr pressure when the temperature is 20.9°C. How much more pressure will the gas exert if the temperature is raised to 44.1°C?
  
• A gas at 69°C occupies a volume of 0.67 L. At what Celsius temperature will the volume increase to 1.86 L?
  
• What volume of gas is generated at STP when 4.6 g of Aluminum Carbonate is placed in 0.75 M Nitric acid?
  
• When does the reaction shift, and how do you know when? For Le Chatelier's Principle
  
• How do temperature and pressure work in le Chatelier's principle?
  
• Why does Ti(OH)4 decompose into TiO2 and H2O? What are the rules for writing a decomposition reaction
  
• What is the octet rule and how does it work?
  
• What are the rules for predicting products of the various types of acid base reaction?
  
• In calculations, do the molar masses of diatomic elements ever need to be doubled to account for this?
  
• How is Q= mCdeltaT used, what are the variables, what are the units, and how does it work?
  
• What is the wavelength of the radio station 99x if it has a frequency of 99MHz?
  
• How does increasing the wavelength by 50% affect the frequency of a wave on a rope?
  
• Which of the following are liquid at a room temperature and how can you tell? I, Br, Ne, Pb, Hg.
  
• Which of the following are inner transition metals? No, Sn, Mg, Am.
  
• Why do noble gases have the highest ionization energies?
  
• If reaction #A-> B# is exothermic, how does the activation energy for the forward reaction compare with the activation energy for the reverse reaction, #B -> A#?
  
• 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?
  
• Why are catalysts not consumed in the reaction?
  
• Apply collision theory to explain two reasons why increasing the temperature of a reaction by 10 K often doubles the reaction rate?
  
• A 52 g piece of a metal is heated to 125 degrees C. It is placed in 80 mL of water at 23 degrees C. If the final temperature of the water is 29 degrees C, then what is the specific heat of the metal?
  
• What happens to the concentration of reactants when a reaction shifts right?
  
• Assuming that sodium bicarbonate is the limiting reactant, determine the percent yield of a reaction between 2.01 g of sodium bicarbonate and 24.6 mL of 1.5 M acetic acid? They produce 0.54 L of 20 degree C CO2 at 750 mmhg.
  
• Nitrogen and oxygen gases are combined to form nitrogen dioxide gas. All gases are at the same temp and pressure. If 10 L of each gas react, determine the identity and volume of the excess reactant left over?
  
• A student adds 50 g of KNO3 to 50 mL of water at 60 degrees C. The solution is cooled to 10 degrees C and then poured through a piece of 2 g filter paper in a funnel which is dried overnight. What is the predicted mass of the dried filter paper and solid?
  
• Other than angiosperms, what are the types of plants?
  
• What is the difference between hemoglobin and oxyhemoglobin?
  
• What is cAMP and what does it do? How and where is it formed and used?
  
• What is NADH? What does it do and how and where is it formed?
  
• What is #FADH_2# and what does it do?
  
• What are NAD+, NADH, and NADPH?
  
• What is RuBP?
  
• What is PGA?
  
• What are the steps involved in meiosis?
  
• How does the ABC Model of Plant Development work? What are A genes, B genes, and C genes?
  
• What is nitrogen fixation? What does it mean for something to be fixated?
  
• What is the definition of eutrophication?
  
• How do birds transport brine shrimp from one area to another?