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a) A mixture of aluminum and zinc weighing 1.67g was completely dissolved in acid to give 1.69L of hydrogen gas measure at STP. What is the weight of aluminum in the original mixture?
The equations are: 2Al + 6H^+ -> 3H2 + 2Al^3+ Zn + 2H^+ -> H2 + Zn^2+
b) Will indium display the photoelectric effect with UV light? With infrared light?
Using the equation Fe2O3+2Al-->2Fe+Al2O3, how many grams of Al are needed to completely react with 135 g Fe2O3
An unknown compound with a molecular formula of C8H18 reacts with chlorine in the presence of light and heat
The initial temp of the calorimeter is 21.5 degrees celcius. the H2o is initially 98.1 degrees celcius and final temp of both the H2o and calorimeter is 39.2. Calculate the heat capacity in units of J/c. Use 4.184 j/g for specific heat of water
Penicillase is an enzyme secreted by bacteria to inactivate the antibiotic penicillin. The enzyme has a molar mass of 30,000 and a single active site. The catalytic rate constant is 2000 s-1 and the Michaelis constant is KM = 5 x 10-5 M.
You have samples of two different compounds, CH3OCH3 and CH3CH2CHO. which ONE of these tests can be used to distinguish between the pair of compounds shown above. 1. heptane/water solubility 2. dilute HCl 3. H2CrO4 4. NaHCO3 solution 5. Br2 in CH3..
The density of platinum is 21.5g/cm3. Platinum displays a cubic packed structure with a unit cell edge length of 392pm. Calculate the atomic mass of platinum using this data
Carbon-14 has a half-life of 5730 years. A sample of carbon with a mass of 0.120 g has an activity of 40 decays/hr. The initial specific activity is assumed to have been 900 decays/hr/gram.
1. calculate the heat of vaporization of bromine if bromine has pvap 400 mm at 41.0 c and a normal boiling point of
draw a sheme o both reactions inlcuding structures and names of all possible products of monosubustitution only. Choose one reaction and provide appropriate mechanism including all resonance strucutres.
At 40 degrees celsius the vapor pressure of methyl alcohol is 254 mmHg and at the same temperature the vapor pressure of ethyl alcohol is 135 mmHg.
At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.100 M and [NO]=0.400 M. N2(g)+O2(g) 2NO(g) If more NO is added, bringing its concentration to 0.700 M, what will the final concentration of NO be after equilibrium is r..
write a balance chemical equation for the combustion of 1 mol glycerin, and calculate delta H for this reaction at 298K if burning 1.24g of glycerin has a delta E of -54.6 kj
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