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CHEM QUIZ 4 7 ON 5 14 21
Use the following chemical equation to answer the problem:
2C4H10(g) + 1302(g) → 8CO2(g) + 10 H2O(g)
4. Given 2.78g carbon dioxide calculate the amount in grams of oxygen needed to complete the
reaction.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.