Which of the following is equal to one molecule of calcium atoms?
6.022x10^23 molecules of Ca
...
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Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3
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An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have
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Using data from seismic waves, geologists have learned that earth’s interior is made up of several
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