True or false: The formula N2H4(l) is not written in proper form; this molecule formula must be reduced to NH2(l).

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2

Can someone me with 3 and 4 plz. this is for masteries test.