How many oxygen molecules are needed to make 10 carbon dioxide molecules according to the following balanced chemical equation?
2 CO + O2 ? 2 CO2
A) 5
B) 1
C) 4
D) 10
E) 2
Answer: A
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For an electron in the M shell, find (a) the largest possible orbital angular momentum it can have, and (b) the smallest possible orbital angular momentum it can have
Express your answers in SI units, and for each case indicate the subshell (s, p, d, ...) of the electron.
Current understanding holds that a galaxy's type (spiral, elliptical, or irregular) ________
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Analysis of stellar spectra shows that most stars consist of 71% ________, 27% ________, and a 2% mix of the other elements.
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