Calculating the final temperature of the mixture
A 30 g sample of water at 280 K is mixed with 50 g of water at 330 K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
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Acetic acid has a ka= 1.78x10^(-5). Determine the pHof a 0.100 M solution.Calculate the hydronium ion ([H30+)] concentration of a 0.25 M solution of benzoic acid, HC7H5O2, Ka= 6.46x10^(-5).
Given that the enthalpy of formation is -277.7 kJ/mol for C2H5OH(l) and -393.5 kJ/mol for CO2(g), find the enthalpy of formation for C6H12O6.
A equimolar mixture of H2 and D2 effuses through an orifice at a certain temperature. Calculate the composition in mole fraction of the gas that passes through the orifice?
How many grams of precipitate are formed when 204 mL of a 0.794 M aluminum sulfate soultion and 301 mL of a 1.48 M sodium hydroxide solution are mixed together?
Suppose you get the same data that you recorded in your lab but you mistakenly thought the mol ratio of acetylsalicylic acid:NaOH was 2:1 respectively. How would your percent acid in aspirin compare?
How would you prepare 100ml of 0.5M NaOH? Calculate the mass of NaOH needed, and describe the procedure and glassware you would use.
If 0.500 g of antacid was added to 50.00 mL of 0.100 M HCL and 5.65 mL of 0.100 M NaOH was required to titrate the un-neutralized HCL, calculate the actual neutralizing capacity of the antacid in mmol H+ per gram.
Balance the following equation. What is the amount of Cu (in grams) necessary to precipitate 0.50 g of Ag in the presence of excess AgNO3?
how many grams of water can be produced by the reaction of 2.40 mol of C2H2 with 7.4 mol of O2?
Give reasons for your choices. a) wood burning in a campfire b)sulfur in the air reacting with silver flatware to produce tarnish, or silver sulfide c)baking powder in cake batter decomposing to produce carbon dioxide, which makes the cake rise
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