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Regarding Descartes’ Dream and Evil Demon Arguments: 

Choose all the choices where the lefthand term is necessary for the righthand term. For example “Pope, Catholic” vs “Catholic, Pope.” The second combination is such that the lefthand term (Catholic) is necessary for the righthand term (Pope), but not sufficient. 

Round 0.007820to three significant figures.

You dissolve 0.500 mol of NaCl into enough water to make 250.0 mL of solution. What is the molarity?

In the reaction N2+3H2→2NH3, if you have 56.0 g of N2 and 12.0 g of H2, which reactant is the limiting reactant?

Balance the following equation: __ Al + __ O2 → __ Al2O3

Which reaction best represents a combustion reaction?

Which formula represents dinitrogen tetroxide?

In the reaction: 2H2+O2 → 2H2O, if you start with 4 moles of H2, how many moles of H2O can be produced?

Which of the following was the most likely treatment used in the images above?