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What is the concentration of Cl in a solution obtained by mixing 210 ml of 0.620 M KCl and 640 ml of 0.350M
How much heat is required to take 13.9g of water from 35 degrees Celsius to steam at 120 degrees Celsius?
If the initial concentration of AB is 0.230 M, and the reaction mixture initially contains no products, what are the concentrations of A and B after 70 s?
Given the concentration of either hydrogen ion or hydroxide ion, use the ion product constant of water to calculate the concentration of the other ion at 298K
If you had a stoppered flask with basic luminol and then opened it to the air, why would the chemiluminescence be more pronounced than with the flask stoppered?
if a drop of NaOH is despensed from the buret but adherence to the side of the Erlenmeyer flask during its standardization, how will this affecy the molar concentration of the NaOH solution?
Assume you dissolve 2.56g of malic acid, C4H605 in half a liter of water (500g). Calculate the molarity, molality, mole fraction, and weight percentage of acid in the solution.
A solution is prepared by dissolving 307 g of sucrose (C12H22O11) in 684 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
What percentage of the original Ag+ remains in solution when 180 mL 2.10×10-2 M AgNO3 is added to 240 mL 3.76×10-2 M K2CrO4?
Calculate the fraction of atoms in a sample of argon gas at 391 K that have an energy of 12.7 kJ or greater
How many grams of aspiring were lost in the washing process you used to purify the product, assuming you used 50 mL of water for washing? The solubility of aspiring in water is 0.33 grams per 100 mL
a new solid octahedral complex has been synthesis containing only chloride ans ammonia ligands. when 9.64 *10^-4 moles of this complex is dissolved into 425 ml of water , you find out that 19.22 ml
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).
If a sodium hydroxide solution were added to a solution containing lead(II) ions, sodium ions, nickel(II) ions and potassium ions, which ion(s) would remain in the supernatant?
A 120-pound person uses 3 Calories per minute walking at a 20 min/mile pace. Approximately, how many miles would a person have to walk to burn off a scoop of ice cream (175 Calories)?
What is the balanced net ionic equation for the reaction below in acidic solution? Enter the coefficient for each substance. Do not leave any answer box blank. Enter 1 if appropriate, or 0 (zero) if t
Oleum or fuming sulfuric acid available commercially in concentraytions ranging from 20-99% sulfur trioxide. A. What is the percent by mass of sulfur trioxide (SO3) if oleum is expressed as 3H2SO4 5
What is the equilibrium temperature of this system? If your answer is 0° C, determine the amount of water that has frozen. The average specific heat of aluminum over this temperature range is 65
A zero-order reaction has a constant rate of 2.50×10-4 M/s . If after 60.0 seconds the concentration has dropped to 5.00×10-2 M, what was the initial concentration?
Convert your answer from part A to an equivalent in megatons of TNT, the unit used for nuclear bombs. Comment on the degree of devastation the impact of such a comet could cause if it struck a popu
A compound is constituted by mass of 22.6% phosphorus, the rest being chlorine. Given that a volume of 307 mL of the gas has a mass of 1.55 g at 25 °C and 90 kPa, find the molecular formula for
Assume that the two ends are contained in the volume of a sphere whose radius is the root mean square distance between the ends. Using this volume (2 ends per unit volume), calculate the molar concent
If 32.5 grams of CaO are dissolved in 212 grams of water, what is the concentration of the solution in percent by mass?
How do you calculate the vapor pressure of water above a solution prepared by dissolving 34.9 g in glycerin (C3H8O3) to 107 g of water at 343 K?