How many moles are in 454 grams of dinitrogen trioxide (N2O3) ?

Calculate the mass of 0.750 mol of the following substance. na3po4. , i'm not quite sure on how to set up the problem to solve! : (

Explain how global warming could have affected yellowstone frog and salamander habitat's, resulting in changes in the populations of these species

Select the correct answer. which statement best explains the octet rule? a. atoms gain, lose, or share electrons to achieve a full valence shell. b. compounds always consist of eight electrons. c. molecules always consist of eight atoms. d. all atoms require eight electrons to form bonds.