2) What is the coefficient for oxygen when the following equation is balanced? KMnO,-K0+ MnO +50 8)2 D) 3 12) When the equation NR-2Nbalanced the coefficient of hydrogen is 91 D) 4 13) What ions compose the compound magnesium phosphide? and P- 8) Mg3 and P- A) Mg DMg+6 and P6- 24) When the equation_OCH12-CO+ HO is balanced the coefficient of O is: A)S 5) 5 D) 8 16) What is the mass in grams of 5.40 moles of lithium? B) 3.25 x 1024 A) 6.94 15) Which is a spectator ion from the following complete ionic equation: Ag (aq) + NO3(aq) + K+ (aq) + Br(aq)-AgBris)+ K*(aq) + NO3- (aq) AAghe C) Br 17) Calculate the molar mass of calcium nitrate. A) 164.10 g/mol 5,136.03 g/mol QS A) PbK2 Mg 2 and 3- A) 2 C) 132.10 g/mol D) 102.09 g/mol 18) What would be the formula of the precipitate that forms when Pb(NO3)2 (aq) and KSO4 (aq) are mixed? B) HO D) PbSO4 B) 4 91.29 B) C) K(NO3)2 19) What is the correct formula of a compound that has ten oxygen atoms and four phosphorus atoms? A) 100P4 B) P4010 010 P4- DAPO 10 20) What is the coefficient for iron when the following equation is balanced? Fe + Cl FeCl3 D) Ag 37.5 C)3 D) 1 21) When the equation_Ca3N2+ H0-3 Ca(OH)2 + NH3 is balanced the coefficient of H0 is: A) 6 C)2 D) 12