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A sample of blood serum is teasted and found to contain testosterone at a concentration of 766 ng/mL. How many grams of testosterone are present in 30.5 mL of this blood? What is the stoichiometric coefficient for oxygen when the following reaction is balanced using the smallest whole number coefficients? Mg + O2 --> MgO
Describe the following combinations as either soluble or insoluble. 1. Sand sinks to the bottom of a beaker of water. 2.Antifreeze and water mix completely. 3. Benzene, a liquid, floats on the surface of water.
What volume would be occupied by 100 g of oxygen gas at a pressure of 1.50 atm and a temperature for 25° c?
How many electrons in an atom could have these sets of quantum numbers? A) n=3, B) n=5, l=0 and C) n=6, l=1, ml=-1
One model of the hydrogen atom relies upon the idea that the electrons reside in stable orbits from which they can not deviate and are found outside of a small, densely packed group of protons. This model was created by
When a person experiencing heartburn takes a dose of an antacid drug, like Tums or Rolaids, a neutralization reaction occurs in the stomach. How is it chemically possible for the stomach acid to remain acidic even after the neutralization reaction..
Write the condensed electron configurations using the noble gas convention for each of the ions in Kl, BaO, Rb2O, and AlCl3. Which of these ions are isoelectronic with Ar
Car manufacturers are developing engines that use H2 as fuel. In locations where hydroelectric plants produce inexpensive electric power, the H2 can be made industrially by the electrolysis of water.
What mass of magnesium chloride is needed to react with 145 g of silber nitrate accourding to the following reaction: MgCl2(aq)+2AgNO3(aq) -> Mg(NO3)2(aq) + 2AgCl
The equilibrium constant for this reaction is 1.70 x 10^-3. Suppose that 0.860 mol N2 and 0.580 mol O2 are mixed in a 4.00-L reaction vessel. What will be the concentrations of N2, O2, and NO when equilibrium is established?
Density and Identity, The mass of 5.00 mL carbon tetrachloride is 7.97g. What is the density of the carbon tetrachloride?
A buffer solution contains 0.386 M NH4Cl and 0.316 M NH3 (ammonia). Determine the pH change when 0.064 mol HBr is added to 1.00 L of the buffer
Determine the molarity of a solution prepared by dissolving 4.50 mol of NH4Cl in sufficient water to make 2.00 L of solution.
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