Which element is oxidized and which is reduced in the following reactions? N2(g)+3H2(g)→2NH3(g)
Express your answers as chemical symbols separated by a comma. Enter the oxidized element first.
3Fe(NO3)2(aq)+2Al(s)→3Fe(s)+2Al(NO3 )3(aq)
Express your answers as chemical symbols separated by a comma. Enter the oxidized element first.
Cl2(aq)+2NaI(aq)→I2(aq)+2NaCl(aq) Express your answers as chemical symbols separated by a comma. Enter the oxidized element first.
PbS(s)+4H2O2(aq)→PbSO4(s)+4H2O(l) Express your answers as chemical symbols separated by a comma. Enter the oxidized element first.

If the mass of the products measured 120g what would the mass of the reactants a. 30g b. 60g c. 120g d. 240g

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.

An atom of lithium (li) and an atom of chlorine (cl) engage in a chemical reaction. which correctly describes the structure of the resulting chemical compound? hint: consider the class of each element. the chemical compound will have a network structure. the chemical compound will have triple bonds. the chemical compound will have a ball-and-stick structure. the chemical compound will have double bonds.