During chemical reactions the bonds between atoms break and new bonds form. Energy must be absorbed to break a bond, so breaking bonds is endothermic. Making new bonds is exothermic because energy is released. When green copper carbonate decomposes, the equation is:
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Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density
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Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.
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Identify the electromagnets with poles that are reversed from the electromagnet shown above
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Total the mass on the syringe. record it in the correct row of the data table. kg done click and drag weights to change the pressure. click the syringe to zoom in and see the volume. intro
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During chemical reactions the bonds between atoms break and new bonds form. Energy must be absorbed...
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