Why should a chemical equation be balanced? A. To show that the reactants are compounds
B. To show metals from nonmetals
C. To show ionic compounds
D. To show the law of conservation of mass

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How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

Complete each row of the table below by filling in the missing prefix or missing exponent.