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White Phosphorus P consist of P4 molecules it spontaneously ignites on contact with air. If there are 0.350 mole of P4 molecules. how many P4 molecules are present? What is the mass in grams of a sample? How many P atoms are present?
a student reported the follow ing percentages for his unknown mixture 25nh4cl 30 nacl and 50 sio2. assuming that the
How much heat is required to convert 83 g of nitrogen gas to NO2 at constant temperature and pressure in the presence of excess oxygen
While solid Zn metal is put into an aqueous solution of NiSO4, solid Ni metal and a solution of ZnSO4 result. State the net ionic equation for the reaction.
A system consists of an ideal monatomic gas initially at temperature 300.0 K, volume 4.000 L, and pressure 4.000 bar. For the following process, calculate the final values of T, P, V, q, w, ?U, and ?H.
certain temperature and pressure, one liter of CO2 gas weighs 1.85 g. What is the mass of one liter of CH4 gas at the same temperature and pressure?
The enthalpy of activation of a first order reaction is 123kj/mol. The rate constant at 80 C is 1.73x10^-2 s^-1. What is the rate constant at 35 C. (R=8.31 j/mol K)
How many resonance forms are required to represent the bicarbonate ion HOCO21
Draw the molecule by placing atoms on the grid and connecting them with bonds. Show the formal charges of all atoms in the correct structure. Include all lone pairs of electrons.
If this codon is mutated to the sequence 5'-UUG-3' what is the expected consequence for the cell
Estimate the final temperature of the gas if 58g of air at 25 degrees Celsius and 50 bar undergoes a Joule-Thomson throttling to a final pressure of 1 bar. Assume the Joule-Thomson coefficient is independent of temperarture and pressure.
What is the value of Kc for the reaction at the temperature of the reaction Mixture. N2(g)+O2(g) 2 NO(g)
A line in the hydrogen spectrum has a wavelength of 434.5 nm. If this line results from the transition of an electron into the n=2 level explain what was the initial energy state of the electron
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