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A 0.50 sample of compound contains 0.40g of Carbon and .10g of Hydrogen. What is the empirical formula?
Peptide hormones must bind to receptors on the extracellular surface of their target cells before their effects are communicated to the interior. In contrast, receptors for hormones such as estrogen are intracellular proteins. Why is this possible..
When you have two primary or two secondary alcohols on the same molecule, will both undergo oxidation or just one?
Find the approximate pH range suitable for the separation of Fe3+ and Zn2+ ions by precipitation of Fe(OH)3from a solution that is initially 0.015 M in both the ions. Assume a 99% precipitation of Fe(OH)3.
Explain the dissolution of the sulfides of copper, bismuth and cadmium in nitric acid. Include ionic equations. If a yellow precipitate is obtained upon addition of hydrogen sulfide to an unknown solution of Group II cations, which ions are probably..
If a solution containing 92.455 g of mercury(II) chlorate is allowed to react completely with a solution containing 16.642 g of sodium sulfide, how many grams of solid precipitate will be formed?
The Ka for lactic acid is 1.4x10^-4. What is the pH of this buffer after .10 mol of solid NaOH has been added?
Write and balance the equation for the complete combustion of ethane, C2H6. You do not need to include any phase symbols
Calculate the osmotic pressure of a solution containing 25.9g of glycerin (C3H8O3) in 243.5mL of solution at 310K.
Calculate K for 2NO(g)+O2(g)=2NO2(g) from the observation that when equilibrium is established at 500K, there are 0.190 moles NO2, 2.65x10^-4 moles NO, and 0.606 moles O2 in a volume of 0.759 liters.
Gaseous butane (C4H10) reacts with gaseous oxygen gas (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H2O) . If of water is produced from the reaction of 3.49 g of butane and 19.3 of oxygen gas, calculate the percent yield of water..
Calculate the radiation dosage (in grays) for an 85-kg person that is exposed for 7.0 seconds to a 3.0 Ci source of beta radiation. Assume that 100% of the radiation is absorbed and each beta particle has an energy of 1.7× 10-13 J.
State whether each of the following experimental errors would raise or lower the mass of the recovered product:
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