[" The total number of valence eloctaras "],[" wh "9" ."29" ."1(-)/(3)" eat is "(N_(n)is" the avogadou') "]

The total number of valence electrons in 4.2 g of N_(3)^(-) ions is ( N_A is the Avogadro number):

The total number of valency for PO_4^(3-) ion is :

The total number of valence electrons in 4. 2g of N_3^- ion are :

The total number of valence electrons in 4. 2g of N_3^- ion are :

The total number of electrons in 4.2 g of N^(3-) ion is ( N_(A) is the Avogadro's number)

The total number of electrons in 4.2 g of N^(3-) ion is ( N_(A) is the Avogadro's number)

The total number of five-digit numbers of different digits in which the digit in the middle is the largest is a. sum_(n=4)^9 ^n P_4 b. 33(3!) c. 30(3!) d. sum_(n=3)^8 n^n P_3

The total number of constitutional isomers having the molecular formula C_(3)H_(9)N is .