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What is the concentration of an HCl solution if for 50.0 mL of HCl it took 55.1 mL of 0.0875 M NaOH to completely neutralize it.
How many grams of sodium formate, NaCHO2, must be added to 750.0mL of .250 M of formic acid, HCHO2, to obtain a buffer with pH of 5.5 ?
Hardness in groundwater is due to the presence of metal ions, primarily Mg2+ and Ca2+. Hardness is generally reported as ppm CaCO3 or mmol/L Ca2+.
A hypothetical metal has a face-centered cubic unit cell and a density of 6.12 g/cm3. The molar mass of the metal is 143.2 g/mol. What is the atomic radius of this metal?
a saturated solution contains 11.0 g NaBrO3 in 40.0 mL of water at 0 degree Celsius. What is the solubility in g solute/(100 g H2O)? Calculate the mole fraction at this temperature.
If a 2.5 L reaction vessel initially contains 725 torr of cyclopropane at 485C , how long will it take for the partial pressure of cylclopropane to drop to below 105 torr?
Why is molarity not the best means of stating acid strength? Is molarity the most representative form of quantifying acids and bases?
Calculate the mass of solid sodium acetate required to mix with 100.0 mL of 0.1 M acetic acid to prepare a pH 4 buffer. Record the mass in your data table
72.0 mL of a 1.40 M solution is diluted to a volume of 278 mL. A 139-mL portion of that solution is diluted using 161 mL of water. What is the final concentration.
The rate is measured at 300 K. To what temperature must the reaction be raised to double the rate? a) 310k b)333k c)353k d)363k e)373k f)412k
A 47.0 mL sample of gas in a cylinder is warmed from 28 degrees Celsius to 91 degrees Celsius. What is the final temperature?
For a solution having 1 x 10-3 equivalents/liter total alkalinity (contributions from HCO3-, CO32- and OH-) at [H+]=4.69 e-11, what is the percentage contribution to the alkalinity from CO32-
An 18.0-g sample of magnesium is completely burned in the presence of air to form magnesium oxide. What is the mass of the magnesium oxide obtained?
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