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Jules agreed to pay a group of teenagers a fixed amount for washing some cars, enough for each of them to receive $10. Unfortunately, 25 of the teenagers failed to show up. Those already present agreed to do the job, which meant that each who worked got $15. How many teenagers originally planned to wash the cars?
A student wrongly added 12 M HCl to a sample of unknown instead of 6 M HCl. At first a. large amount of light color precipitate formed however some dissolved on further addition of concentrated HCl. State an equation for the reaction that might oc..
If the maximum amount of product possible is formed in the following reactions, what mass of the specified product would you obtain
Oxygen gas most closely exhibits ideal behaviour under conditions of (high/low) temperature and (high/low) pressure.
what ph must be maintained by a buffers solution so that no more than 0.010 of the mg2 present in 0.360 m mgcl2 aq
Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48 g/cm^3. A fitting composed of common brass has a total volume of 127.0 cm^3. How many atoms of copper does the fitting contain
The heat produced from the reaction of 10.0 g of Al (as in part a) was used to heat 500 g of water. The initial temperature of the water was 23 celcius. What was the final temperature of the water. Would the water boil
For analysis, a short peptide seven residues long is treated with FDNB, followed by complete acid hydrolysis and amino acid chromatography. What are the products of these steps. What kind of information can be obtained by amino acid chromatography..
calculate the molarity of acetic acid in a vinegar sample knowing that 5.00 mL of vinegar requires 43.50mL of 0.105M NaoH to just reach the phenolphtalein endpoint in a tritration
When calculating the moles of neutralized buffer from a graph (to use in the equation for calculating buffer capacity)
The osmotic pressure of poly(methyl methacrylate) in tolune has been measured at a series of concentrations at 298 K. Determine graphically the molar mass of the polymer
What is the heat capacity of a bomb calorimeter if the combustion of 2.812 mmol of salicylic acid (C7H6O3(s), ΔHcomb = -3022 kJ/mol) increases the temperature of the calorimeter by 2.612°C?
A reaction mixture initially contains 0.050 M of all three chemical species in a 0.355 L vessel. What will the concentration of the SO2 be at equilibrium?
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