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2.20 grams of chromium reacts with excess oxygen to give 3.22 grams of a chromium oxide. What is the name and formula of the chromium oxide? Write a balanced equation for the reaction
"A sample of a particular radioisotope is placed near a Geiger counter, which is observed to register 160 counts per minute. Eight hours later the detector counts at a rate of 10 counts per minute. What is the half-life of the material?"
A solution is prepared by measuring 33 mL of the concentrated HCl, adding it to water, and diluting to 0.500 L. Calculate the approximate molarity of this solution from the volume, percent composition, and density.
Write the rate laws and determine the units of k (the rate constant) for the following reactions: (a) The reaction A + 2B --> C is found to be second order in A and B, and third order overall
Label and identify ALL functional groups. Label the chiral carbons (*), label the priorities (1,2,3,4) of the four "things" connected to the chiral carbon, draw the arrow or rotation and identify as R or S.
Explain why alcohols such as ethanol and propanol are soluble in water, butanol is moderately soluble and pentanol is slightly soluble
Explain why wet hair placed in curlers that is allowed to dry tends to retain the shape of the curl.
State molecular geometries for the reactants and the product of the reaction of PF5 with the Lewis base NH3 (what adduct is formed?). Include geometry and formal charges in the structures. Also, what hybridization changes occur when PF5 reacts wit..
A saturated solution of sodium nitrate contains 80 g NaNO3 per 100 g H2O. How many grams of NaNO3 must be added to a solution containing 25 g NaNO3 in 75 g H2O to make the solution saturated
a/A sample containing anthracene dissolved in methane was separated using gas chromatography on a column with mobile phase (Vm) and stationary phase (Vs) volumes of 24 mL and 9.4 mL, respectively. For this particular column, anthracene has a r..
1.0994 g lithium sulfate dissolved in 50 mL water b. 10.3 mg lithium sulfate dissolved in 0.50 mL water c. 0.2575 g lithium sulfate dissolved in 12.5 mL water d. 5.497 g lithium sulfate dissolved in 2.5 L water
Calculate the molarity of a solution of glycerol made by dissolving 34.000 mL glycerol at 15 C in enough water to make 300.00 mL of solution.
What total mass of hydrogen is contained in 7.1 g of solution that is 51 % hydrogen peroxide
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