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A 45-g serving of a white rice contains 9.0 µg of inorganic arsenic. What is the concentration of arsenic in ppb? _____________
How many digits should this number contain? _____________ If you didn't already do this, write the answer in scientific notation to show the correct number of digits. ______________
What is the concentration of Cu^2+ in the other half-cell? (Assume the concentration in the unknown cell to be the lower of the two concentrations.
Use the density of copper (8.95 g/cm3) and its molar mass (63.55 g/mol) to calculate an approximate atomic radius for copper.
product and propose a mechanism when 1-pentene reacts with bromine and water followed by the addition of sodium hydride.
the ionization potential for a certain atom is 350kjmol. if the electron is in the first excited state the ionization
Describe the lysing process that occurs when performing the "slow freeze quick thaw" procedure for preparing a crude extract of rGFP
What is the concentration of each species present when equilibrium is reached? b. What is the value of Kc for this reaction at 500K?
A 53.5 g of an ideal gas of molecular weight = 10.5 g/mol is confined at a pressure of 50 kPa. The density of the gas is 0.164 g/L. Compute the temperature of the gas in degrees Celsius.
calculate the speed of the reaction when the concentration of N2O5 is of 0.0100 M b) How long, in minutes, to wait before the N2O2 concentration is reduced from 0.500M to 0.200M
Find the ?H for the reaction below, given the following reactions and subsequent ?H values: Zn(s) + 1/8S8(s) + 2O2(g) ? ZnSO4(s) Zn(s) + 1/8S8(s) ? ZnS(s)
A concentration cell consists of two Sn/Sn2+ electrodes. The electrolyte in compartment A is 0.15 M Sn(NO3)2. The electrolyte in B is 0.82 M Sn(NO3)2. Which electrode is the cathode
ethylene diamine tetra-acetic acid edta is awater-soluble compound that readily combines with metals such ascalcium
methanol, CH3OH can be produced through the reaction of CO and H2. if 75.o grams of CO is used and the typical yield is 79.8%, what mass of methanol is likely to be produced.
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