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What are amino-acid tRNA synthetase enzymes and why are they important in the biology of cells? How many different ones do you know exist in any given cell type?
Compute the enthalpy change for this reaction per mole of this substance and dissolves via the reaction and the temperature of the solution rises to twenty eight degree celsius.
An unknown organic compound is mixed with 0.5190 g of naphthalene crystals to give a mixture having a total mass of 0.5959 g. The mixture is heated until the naphthalene melts and the unknown substance dissolves.
During an experiment assume that you used a 0.560g piece of pure aluminum in the synthesis of alum and collected 5.255g of dry alum. what is your percent yield of alum?
Calculate the difference in pH when 4.01 g of NaClO is added to 364.8 mL of 0.50 M HClO. Ignore any changes in volume.
In an acid-base titration experiment, 50.00 mL of a 0.0500 M solution of acetic acid (ka=1.75 x 10^-5) was titrated with a 0.0500 M solution of NaOH at 25 degree C
Calculate the OH- of each aqueous solution with the following H3O+ A baking soda 1.1 X 10-8 M B orange juice 2.1 X 10-4
Lithium iodide has a lattice energy of -7.3 times 10^2 kJmol and a heat of hydration of -793 kj/mol. Find the heat of solution for lithium iodide.
what conclusions can be reached about the relative strengths of Ni2+(aq) and/vs Cu2+(aq) as oxidizers? Also write the correct reaction.
What volumes of the stock solution will you have to pipet into the flasks to prepare standards and What mass of gas does the container contains If the volume of a container
The mass of a cube of iron is 284 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
Starting with 2.5 grams of vitamin D3 and 10mg of palladium catalyst, how many millimoles of H2 will be necessary to hydrogenate all of the Carbon Carbon double bonds in D3?
When 1.43g of the hydrocarbon is burned, 2.39 grams of water and 4.40 grams of carbon dioxide is collected. Determine the empirical formula of the hydrocarbon. Name the hydrocarbon.
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