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a chemist often uses a white card with a black mark to aid in reading the meniscus of a clear liquid. How does this technique make the reading more accurate
assuming the volume of the stomach is 1.0L, what will the pH change of the stomach acid resulting from the ingestion of one regular strength strength maalox tablet?
Calculate the molar concentration of OH - ions in an 1.37 M solution of hypobromite ion, BrO- (Kb = 4.0 10-6).
Aluminum has a specific heat of 0.900 J/g·°C. How much energy is required to raise the temperature of 160. g of aluminum from 20.0°C to 183.0°C?
A room temperature aqueous solution is 0.10 M in zinc acetate, 0.50 M in strontium acetate and 15.2 M in nickel (II) acetate. At what concentration of carbonate
what is the aluminum ion, Al3+, concentration if the cell potential is 0.447 V and the manganese (II) ion concentration is 0.10 M?
Joe makes up a 0.1M solution of Potassium Fluoride. He uses a pH meter to test the pH of the solution. What is the most reasonable value he would find?
Polycyclic aromatic hydrocarbons (PAHs) are a class of organic chemicals associated with the combustion of fossil fuels. Undeveloped areas may have total PAH soil concentrations of 5 µg/kg
What is the half-life of a second-order reaction in which 45.0% of the original concentration of 1.00 M remains after 325 seconds?
Calculate the molarity for: A.0.5g CO2 in 652 g of water. B. 56g of NH3 in 500 g of water. C. 3.21 g of NaOH in 3405 ml of water.
One can approximate boiling point at reduced pressure using a pressure-temperature nomograph. What would you expect the observed boiling pint to be at 50 torr(mm) for a liquid that has a boiling point
The known metal ion solution used in this experiment contains 0.10 M of each of the six metal ions. What are the initial concentrations of Ag, Pb, and Cl before any precipitation/reaction occurs, but after the mixing (i.e. dilution) of equal volum..
Consider all the valence electron pairs of the central atom-both those that are shared in covalent bonds, called bonding pairs, and those that are unshared, called non-bonding pairs or unshared pairs.
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