#1: at stp, how many molecules of nitrogen gas are in 22.4 l? a. 6.022 × 10^22 b. 6.022 × 10^23 c. 6.022 × 10^24 d. 6.022 × 10^25 **my b is that right? ? @aaronq : )

At STP, 1 mol = 22.4

1 mol = 6.022 X 10^ 23

so your answer is right it is B 6.022 X 10^ 23

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.