If the volumes in the buret and the flask are identical and the concentration of the acid in the buret is 0.500 M, what is the concentration of the base in the flask?

29.1-12=17.1the answer is this one

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If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom