A mixture of MnCl2 and inert material is analyzed to determine the Mn content. First the mixture is dissolved in water. Then all of the chloride ion is precipitated as AgCl by the addition of an excess of silver nitrate. MInCl2(aq) _ 2AgNO3(aq)- :2AgCI(s)-Mn(NO3)2(aq) In one experiment, a 0.7094 g sample of the mixture resulted in 1.3651 g of AgCI Determine the percent (by mass) of Mn in the mixture. % Mn

Using this reversible reaction, answer the questions below: n2o4 2no2 (colorless) (reddish-brown) -as the temperature increased, what happened to the n2o4 concentration? -was the formation of reactants or products favored by the addition of heat? -which reaction is exothermic? right to left or left to right? -if the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct? n2o4 2no2 + 14 kcal n2o4 2no2, hr = +14 kcal n2o4 + 14 kcal 2no2 n2o4 2no2, hr = -14 kcal

Where are the noble gases located in the periodic table? a. in the center b. on the left side c. in the upper right corner d. on the far right side

Ascientist measures the vapor pressure of a liquid. at 15° c, the vapor pressure was 19 kilopascals. at 25° c, it was 31 kilopascals. at 35° c, it was 59 kilopascals. which statement can be inferred from the observations?