Someone help please , I’ll give brain . Question 10 !
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Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.
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Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?
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At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure
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