Questions Suppose that you made the experimental errors described below. Would these errors lead you to obtain a higher or lower molar mass of carbon dioxide? Explain your reasoning.
A. Some CO2 gas leaked out of Flask B as you went to the balance room to weigh it.
B. When filling Flask B with water you did not fill it up to the brim, leaving some air at the top.

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i do not get it   at all

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.