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    why do i keep getting a thng that says i'm not authroized to join chat?

    i'm in chat and i hear for about 5 minutes and it goes out,,,,,,,then this comes up
  2. A

    chemistry help, please help ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!?

    A sample of gas is collected over water at a temperature of 35.0*C when the barometric pressure reading is 635 torr. What is the partial pressure of the dry gas, given P(H2O) = 42.2 torr? answer in units of torr (can you also explain how you did it)
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    A few chemistry questions, please help!!!!!!!!!!!!!?

    1) How many half-filled orbitals do each of the following have in the ground state? a) O b) B c) Ar d) Mn e) K f) Cf g) Zn MULTIPLE CHOICE:::: 1) Carbon absorbs energy at a wavelength of 150 nm. The total amount of energy emitted by a carbon sample is 1.98 x 10^5 J. Calculate the number of...
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