Answers edited by Ernest Z.
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What is an electrochemical cell that generates electrical energy?
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How many hybrid orbitals are present in the molecule PCl5?
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Why did James Chadwick use beryllium?
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How big is a neutron relative to a proton?
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What is wave-particle duality?
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What functional groups are in glucose?
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What type of mixtures can be separated by filtration?
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What is the VSEPR model for #"CH"_2"O"# ?
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What is osmolarity?
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What are some examples of solutions?
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How are metalloids different from metals?
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Question #d111e
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How do gas laws affect hot air balloons?
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How does a gas expand according to the kinetic molecular theory?
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How does changing the units of measurement affect correlation?
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When 2.00 g mixture of Na and Ca reat with water, 1.164 L hydrogen was produced at 300.0 K and 100.0 kPa. What is the percentage of Na in the sample?
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How does the octet rule affect metals?
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Question #42e19
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In the following reaction, 2NaN₃ decomposes to form 2Na plus 3N2. If 500 g of NaN3 decomposes to form 323.20 g of N2, how much Na is produced?
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How can I calculate the wavelength from energy?
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What is the equilibrium constant for the reaction of NH3 with water?
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How can matter be converted into energy?
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Question #3f409
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What is the orbital hybridization theory?
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Question #d708e
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Question #8d233
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How can I find the percent compositions of Mg(NO3)2?
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How is Avogadro's law used in everyday life?
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How do you calculate the vapor pressure of ethanol?
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How can I find the percent compositions of N2S2?
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How does the kinetic energy of the alpha particles affect the angle of deflection?
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How many valence electrons does hydrogen have?
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Question #42ee6
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What is the percent concentration of a 300-mm solution of CaCl2?
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Hydrogen sulfide reacts with sulfur dioxide to give H2O and S,
H2S + SO2 = H2O + S(solid), unbalanced.
If 3.0 L of H2S gas at 760 torr produced 4.8 g of sulfur, what is the the temperature in Celsius?
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Question #dc373
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During the day at 27°C a cylinder with a sliding top contains 20.0 liters of air. At night it only holds 19 liters. What is the temperature at night?
Give the answer in Kelvin and °C?
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Question #731c8
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In a nuclear fission reaction, which has more mass, the initial uranium atom or the sum of its products?
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How are hydrogen bonds related to cohesion?
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How do you calculate pH of acid and base solution?
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What is the difference between a sigma bond and a pi bond?
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What is the percent concentration of a 6m solution of NaCl?
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Question #fee47
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What are the mole fractions of the components of the solution formed when 92 g glycerol is mixed with 90 g water?
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Why do 0.60 grams of acetic acid dissolve in 200 grams of benzene to form a solution that lowers the freezing point of benzene to 5.40°C?
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How can I identify double displacement reactions?
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Hydrogen sulfide decomposes according to the following reaction, for which Kc=9.30E-8 at 700 degrees Celsius. 2 H2S(g) --> 2 H2(g) + S2(g) If 0.29 moles of H2S is placed in a 3.0-L container, What is the equilibrium concentration of H2(g) at 700 degrees Celsius?
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How can molarity be used as a conversion factor?
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How can I draw the Lewis structure for H2O?
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What is the name of the ionic compound Na3AlF6?
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What is the chemical formula of a diamond?
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Question #bc1f7
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Why are atomic masses of most of the elements fractional?
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Are the contributing structures of resonance structures isomers?
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What is an f orbital?
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How does beta decay occur?
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How many atoms or molecules are there in 200.0 mL of sulfur dioxide gas?
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Question #b497b
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What is the molecular formula of a hydrocarbon that has an empirical formula of CH2 and a molar mass of 56.12 g/mol?
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How does pH change protein structure?
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Question #fa782
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Question #c88fc
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Nitrogen gas (N2) reacts with hydrogen gas (H2) to form ammonia (NH3). At 200°C in a closed container, 1.05 atm of nitrogen gas is mixed with 2.02 atm of hydrogen gas. At equilibrium the total pressure is 2.02 atm. What is the partial pressure of hydrogen gas at equilibrium?
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What is Graham's Law of Effusion?
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How do you balance this redox reaction using the oxidation number method? Fe2+(aq) + MnO4–(aq) --> Fe3+(aq) + Mn2+(aq)
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Question #ddc52
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What biochemical molecules contain pyrimidine rings?
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What are the four categories of biochemical molecules of the human body?
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What is the noble gas notation for magnesium?
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How much would I spend in a week if I average 25 km/day, get a mileage of 30 miles per US gallon, and petrol costs €1.26/L with a conversion rate of €1= $1.26?
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How you would make 100.0 ml of a 1.00 mol/L buffer solution with a pH of 10.80 to be made using only sodium carbonate, sodium hydrogen carbonate and water? How much sodium carbonate and sodium hydrogen carbonate would you use?
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What does Hess's law say about the enthalpy of a reaction?
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How can I calculate osmolarity of blood?
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