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Multiple choice (true or False) 1. When you measure a volume of a liquid using a graduated cylinder, read the top position of the meniscus of a liquid to determine the volume 2.Extra chemicals you sampled should be returned into the original container 3.Report immediately any accident in the lab, even if it is minor, to the lab instructor. 4.Wearing eye goggles is required for only when certain experiments performed in the chemistry laboratory 5. An organic dye, phenolphthalein is used for detecting an end point of an acid-base titration 6. The boiling and melting points are physical properties of a compound and the solubility is a chemical property of a compound 7 the temperature 98.6F is equal to 37C and 310k (true) 8.It takes 15.0ml of 0.40M NaOH solution to neutralize 20.0ml of 3.6M HCL 9.boyle's law states that pv=k when t and n are constant (true) 10. 2Br-(aq) + Pb2+ (aq) --- PbBr2(s) is a redox reaction
Which of the following chemical equations corresponds to the standard molar enthalpy of formation of N2O
Calculate the amount of heat needed to convert 96 g of ice at -24C to water at 28C. The specific heat capacity of H2O(s) is 2.1J/g*C.
A mixture containing 9 mol of F2 and 4mol of S is allowed to react. This equation represents the reaction that takes place. 3F2+S-->SF6
How much heat is released when 4.50 g of methane gas is burned CH4 (g) + 2O2(g) -> CO2 (g) + 2H2O(l) H=-890kJ
Calculate the mass of propylene glycolC3H8O2 that must be added to 0.320kg of water to reduce the vapor pressure by 2.88torr at 40C Pressure H2O 40C 55.3torr
Calculate the pressure and temperature at which 1.0 mol of H2O, HCl, and C6H6 corresponds to the same states as 1.0 mol of CH4 at 2.00 atm and 298
Assuming all gases are at the same pressure and temperature, how many liters of CO2 are formed from 15.0L of CO.
a tire has a volume of 535 cm3 at a temprature of 20 c while in use the temprature of the tire rises to 65 c calculate
A student placed 18.5g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100
Calculate the final concentration of a sodium hydroxide solution prepared by adding 10.00mL of 5.325M sodium hydroxide stock solution into a 250.00mL volumetric flask and then filling to the mark with de-ionized water.
A buffer solution contains 0.219 M CH3NH3Cl and 0.428 M CH3NH2 (methylamine). Determine the pH change when 0.097 mol HI is added to 1.00 L of the buffer.
Consider an apparatus shows gases in two containers and one empty container. When the valves are opened and the gases are allowed to mix at constant temperature, what is the distribution of atoms in each container
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