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Where did the elements heavier than hydrogen and helium come from?
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Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture
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What type of electromagnetic radiation has a shorter wavelength than blue light
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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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Where did the elements heavier than hydrogen and helium come from?...
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