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Question- If a student reacts with 3.4g of h2o with sulfur to produce 4.6 grams of sulfur hexafluoride SF6, what is the mass in grams of sulfur if 2.01x10^22 atoms of sulfur where found at the start of the reaction?
What is the detector in a spectrograph in which spectral lines are recorded photographically
Suppose that you first titrated 25.0 mL of 0.500 M HCL with 0.500M NaOH and then 25.0 mL of 0.500 M of a weark acid HA with 0.500M NaOH. How would the titration curves compare at 10 or 15 ml of NaOH beyond the equivalence points? Explain.
Give the enthalpies of the reaction P4 (s) + 3O2(g)-->P4O6(s) Delta H= -1640.1 kJ. P4 (s) + 5O2 (g)--->P4O10 (s) Delta H= -2940.1 kJ Calculate the enthalpy change for reaction: P4O6(s) + 2O2 (g)--->P4O10(s)
Determine how many grams of copper sulphate are there in 219 grams of an aqeous solution that is 20.2% by weight of copper sulphate?
A concentration cell is set up at 298K with 100mM CuSO4 in one chamber and 345mM CuSO4 in the other, as well as Cu electrodes in each. Explain what is the voltage of this cell
Explain A 5.58-g sample of graphite was heated with 70.0 g of O2 in an 8.00 L flask. Subsequent to the reaction was complete the temperature in the flask was 182 degrees Celsius. What was the total pressure inside the flask
Carry out the correct operation on the following set of values. Give answers in correct units and in the correct number of significant digits.
Descrbe the pH of a buffer soluton consisting of 100mL containing 0.1M CH3COOH and 0.125 CH3COO-, both before and after the additon
the energy levels the electron can occupy in the be3ion can be calculated using the energy level equation. calculatethe
How would you use a Grignard reaction of an aldehyde or ketone to synthesize diphenylmethanol? Draw the Grignard reagent and the aldehyde or ketone you would use below.
what is the ph of the solution which results from mixing 150 ml of 0.25 m ch3co2haq and 125 ml of 0.25 m naohaq at 25
at 25 c and 1.0 atm .25 g of a gas dissolves in 1.00l of water. what mass of the gas dissolves in 1.00l of water at 25c
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