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A current of 1.50 A flows in a conductor for 6.0 s. How much charge passes a given point in the conductor during this time? To separate a 0.25-C charge from another charge, 30 J of work is done. What is the electric potential energy of the charge?
A lake has a pH of 8 and the total molar concentration of nitrogen species (NH3 and NH4+) is 7.1×10-4 mol/L. what is the percentage of aqueous NH3 in the lake
By mistake, a worker at an electroplating shop mixes a small amount of sulfuric acid into a large tank of wastewater containing sodium cyanide. The reaction produces a toxic gas, hydrogen cyanide, as shown below:
A 3.50-g sample of magnesium hydroxide was treated with 50.0 mL of a 0.500 M aqueous sulfuric acid solution. Calculate the number of grams of magnesium hydroxide that remained undissolved.
a gas is placed in a storage tank at a pressure of 20.0 atm at 20.3 c. as a safety device there is a small metal plug
8. 35.0 mL of water at 18.2 degrees celcius is added to 24.4 mL of mercury at 35 degrees celcius. What is the final temperature of the mixture (Assume that no heat is lost to the surroundings. The density of mercury is 13.534g/mL.
What is a grain boundary. (Multiple answers can be selected.) 1. A point defect 2. A line defect 3. A two-dimensional interface where the solid structures are different
Calculate the pH that results when the following solutions are mixed: 6.8 mL of 0.500 M sodium acetate and 15.2 mL of 0.350 M acetic acid.
You have a solution made by dissolving 1.5230g of solid Na2(C2O4) and diluting to a volume of 250.00mL: How many moles of sodium ions are contained in this solution
By substituting two hydrogen atoms on the benzene ring with methyl groups, write line-angle formulas of all constitutional isomers. Name each isomer.
A 20.0-mL sample of 0.25 M HNO3 is titrated with 0.15 M Na OH. What is the pH of the solution after 30.0 mL of NaOH have been added to the acid?
When 0.234 g of the hydrate Cr2(SO4)3•xH2O is heated, 0.128 grams of anhydrous Cr2(SO4)3 remains. What is the value of x in the formula for the hydrate
An acid solution was standardized against NaHCO3 which was prepared as 75 g NaHCO3 in 1 Liter. Find the Normality of the acid if 28 ml was required to decrease pH to 4.5 if volume of NaHCO3 used in titration was 0.1 Liters.
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