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Which of these pairs of elements have the same number of valence electrons? oxygen (O) and bromine (Br) selenium (Se) and bromine (Br) carbon (C) and lead (Pb) oxygen (O) and carbon (C) sodium (Na) and
answered
Jun 27, 2017
Chemistry
high-school
4
votes
188k
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These are folds in the mitochondria that contain enzymes important to ATP production and also increase the surface area for ATP production.
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Jun 16, 2017
Biology
high-school
4
votes
168k
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What is the ratio of frogs to flies in simplest form 4:8
answered
Jan 31, 2017
Mathematics
middle-school
4
votes
222k
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