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1) When a metal at a higher temperature is added to water at a lower temperature. heat is inevitably lost to the container beaker or styrofoam cup. how will this unmeasured heat loss affect the determination of the specific heat of the metal?
2) Explain why the extrapolated temperature is used to determine the maximum temperature of the mixture rather than the highest recorded temperature in the experiment.
3) Three student chemists measured 50 mL of 1.00M NaOH in separate Styrofoam coffee cup calorimeters (Part B). Brett added 50.0 ML of 1.00 M HCL to her NaOH; Dale added 45.5ml of 1.10M HCL (equal moles) to his NaOH solution. Lyndsay added 50.0 ml of 1.00 M HCL to her NaOH solution. Each student recorded the temperature change and calculated the enthalpy of neutralization.
Identify the student who observes a temperature change that will be different from that observed by the other two chemists. explain why and how(high low)temp will be different.
C6H6 gas is burned in the presence of excess oxygen. What volume of liquid water could be condensed from combustion of 12.0 moles of Benzene (C6H6)? Assume density of water 1.0 g/mol.
the energy is 18.44 kj/mol and for the methyl group in equatorial position the energy was 8.66 KJ/mol based on this information which is more stable and why?
when 56.6 g of calcium and 30.5 g of nitrogen gas undergo a reaction that has a 93.0% yield, what mass (g) of calcium nitride forms.
Balance the following reaction and predict the number of moles of SO2 required to completely react with 3.0 moles of 0.2 SO2+O2---->SO3
What volume of hydrogen gas, in liters, is produced by the reaction of 4.17g of iron metal with 60.0 mL of 3.00M HCl?
Calculate the Ph after the following volumes of titrant have been added (a)0ml (b)20ml (c)59ml (d)60ml (e)61ml (f)65ml. will give all the points with some bonus points for showing all the steps
What is the equilibrium constant Kc for the reaction below? Assume temperature is 25oC. (Represent the reaction below as a sum of reactions and then combine the corresponding K values to obtain Kc for the reaction below.)
Adrenaline is the hormone that triggers the release of extra glucose molecules in times of stress or emergency. A solution of 0.64 g of adrenaline in 36.0 g of CCl4 elevates the boiling point by 0.49°C. What is the molar mass of adrenaline?
Use a molar mass of 800g/mol for the vegetable oil and use a density of 0.88g/mL for vegetable oil and 0.79 g/mL for methanol to calculate how many moles of ethanol are used.
When the flask is allowed to cool the vapor condenses and aire again refulls the flask. Re weighing the flask and figure out the the wight of the unknown vapor which filled the flask during the boiling. Is the error in volume measurement or the err..
consider the decomposition of the compound c5h6o3 as given. c5h6o3 g rarr c2h6 g 3 co g and determine k for this
Consider the titration of 30.0 ml of 0.025 M NH3 with 0.020 M HCl. Calculate the pH after the following volumes of titrant have been added.
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