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Cavendish prepared hydrogen in 1766 by rather quaint method of passing steam through a red hot gun barrel. H2O + Fe ---> Fe2O3 + H2 (unbalanced) What volume of H2 at a pressure of 820 torr and a temperature of 23C can be prepared by a reaction of 39.0g of H2O?
a typical aspirin tablet contains 324 mg of aspirin (acetylsalicylic acid, C9H8O4, Ka = 3.0×10-4). Imagine you dissolve two aspirin tablets in a 275 mL glass of water. Calculate the solution's pH.
A 30 g sample of water at 280 K is mixed with 50 g of water at 330 K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
If 100 g of Mg reacts with excess HCl, what volume of hydrogen gas at 25 degrees C and 1.0 atm pressure will be produced. balanced equation
How many dimes do you need to buy as much candy as possible? How much should all these dimes weigh? How many pieces of candy could you buy? How much would this candy weigh? How many pieces of candy could you buy with twice as many dimes?
Vapor pressure measurements at several different temperatures are shown below for mercury. Determine graphically the molar heat of vaporization for mercury.
When measuring horse radish peroxidase you found that a purified preparation has a specific activity of 10mmolar/sec/mg protein. suppose you added to an assay a competitive inhibitor that would not produce a colored product.
why a bromine radical is more selective than a chlorine radical during abstraction of a hydrogen on a hydrocarbon?
what is a cyanide based compound used in synthesis of methadone?
Calculate the current strength needed to vaporize 12 g of compound X (Mw = 180.16 g/mol and a molar enthalpy of vaporization of 106.4 kJ/mol) in 30 seconds using a 16 volt battery.
How many grams of CaH2 (Molar Mass = 42.1 g/mol)are needed to generate 16.0 L of H2 gas if the pressure of H2 is 729 torr at 21.0°C?
a 25 ml of sample of HNO3 is neutralized by 32.1 ml of 0.150 M KOH(aq). What is the molarity of HNO3?
The rate at which a metal alloy oxidizes in an oxygen containing atmoshphere is a type of the Arrhenius equation (rate(k)=Ce^(-Q/RT)). For example, the rate og oxidation of a magnesium alloy is represented by a rate constant k.
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