How many atoms of nitrogen are present in 2.49 moles of nitrogen trifluoride ? atoms of nitrogen?

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.

What royal scientist used the 29th day of frozen vapor to encounter elements for mastering new culinary creations?

What does the mass of 0.7891 mol of ferric oxide (fe2o3)