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What is the molecular weight of sodium bicarbonate urgennnt
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Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line
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What type of matter is made of only one kind of atom
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Who discovered a pattern to the elements in 1869?
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What is the molecular weight of sodium bicarbonate urgennnt...
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