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Pre-Lab Assignment- Understanding Activity 3 in this manual and significant figures and uncertainty in measurements in general will help you answer the last two questions. 1. In your own words, what is the purpose of this experiment? 2. Briefly outline a procedure for the experiment you will carry out in lab. 3. The density of a liquid is determined using a 50.00 mL volumetric flask (which has an uncertainty of ±0.01 mL). Would the reported density value be better, worse, or the same if a 600-mL beaker (which has an uncertainty of ±10 mL) was used for the volume measurement? Explain how the reported values would be different and which would be preferred. 4. What kinds of limitations will you encounter in the precision of your density measurement(s)? What will you do (or use) in your lab procedure to ensure the highest level of precision possible?
How many moles of H2 can be produced from x grams of Mg in magnesium-aluminum alloy? The molar mass of Mg is 24.31 g/mol
Determine the concentration of the sodium hydroxide solution? Considering this balanced equation given as :
If the solution is 40.0% K2CO3 by mass, what is the predicted freezing point of this solution in °C, assuming full ionization.
If 488 g SO2 escaped into the atmosphere and all the escaped SO2 were converted to H2SO4. How many grams of H2SO4 would be produced in the atmosphere?
Consider the equilibrium represented by the following equation: Heat + H2O(l) H2O(g) in which T=373K, P=101kPa Which of the following will favour the reverse reaction? (a) The total volume of the system is increased
The precipitate of CaC2O4, weighed 1.437 grams determine the molarity of calcium chloride in the solution?
determine volume it would have if it reaches an altitude where the temperature = -33 0C , pressure = 0.65 atm?
A 50.0 mL sample of 0.55 M benzoic acid, C6H5COOH, a weak monoprotic acid, is titrated with 0.47 M NaOH. Calculate the pH at the equivalence point. Ka of C6H5COOH = 6.5 10-5
Find the heat of combustion in kJ/g for each gas. These values are valid at 25°C, where the water produced by the reaction is in the liquid state.
how much energy is needed to heat 24.8g water from 64 degrees to 123 degrees celsius?
what is the freezing point(Degrees C) of a solution prepared by dissolving 11.3g of Ca(NO3)2 ( formula weight= 164g/mol) in 115g of water?
Assume a gasoline is isooctane, which has a density of 0.692 g/mL. What is the mass of 2.5 gal of the gasoline (1 gal = 3.78 L)? Answer in units of kg.
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