What volume would 409 grams of CO2 occupy at STP

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Based on its chemical properties, identify the position of each chemical family on the periodic table.

Analyze the reaction to determine whether the reaction is exothermic or endothermic. explain your reasoning.