The common name for CH4 is ______________
Fill in the blank(s) with correct word
methane
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Analysis of stellar spectra shows that most stars consist of 71% ________, 27% ________, and a 2% mix of the other elements.
A. hydrogen; helium B. hydrogen; oxygen C. helium; hydrogen D. oxygen; nitrogen
The density of a submerged submarine at rest is about the same as the density of
A) a crab. B) iron. C) a floating submarine. D) water. E) none of the above
The energy released by a certain reaction is enough to totally evaporate 125 kg of water at its boiling point. How much mass was lost during this reaction? (LF = 334,000 J/kg for water, c = 3.00 × 108 m/s)
What will be an ideal response?
Which type of rock solidifies from molten magma?
a) igneous rock b) sedimentary rock c) metamorphic rock d) cross-bedded rock