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What is the formula that this ionic compounds could form sr2+p3-o2-
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The atomic number, or number, is the described as the number of in the nucleus of an chemical element.
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When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?
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Mu Cephei is no longer considered a main sequnce star. This means it has run out of:
A:hydrogen
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