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A solid Silver Group (Anion) unknowon that contains only sodium ion as a catio is acidified and divided into tow portions, to both of which 6 M HC2H3O2 and chlorine water are added. On treatment with chloroform, one portion developeds a violet color in the chloroform layer. Both layers of the other portion remain colorless. An aqueous solution of the original solid is acidified with HNO3(aq); AgNO3(aq) is added, and a precipetate that soluble in NH3 (aq) forms. Which anion(s) are present ans which are absent? EXPLAIN.
Suppose that 25 g of each of the following substances is initially at 28.0degrees C. What is the final temperature of each of the following substances upon absorbing 2.35 kJ of heat.
B2H6 + 3O2= B2O3+3H2O ;DELTA H=-2035KJ how much heat is released when a mixture of 7.35 g B2H6 and 2.60 g O2 is burned?
The solubility of compound A in ethanol is 0.80g per 100.0mL at 0oC and 5.00g per 100.0mL at 78oC. What is the minimum amount of ethanol needed to recrystallize a 12.00g sample of compound A.
A 13.4-g sample of CaCl2 is dissolved in 109 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution
If 15 grams of copper(2) chloride react with 20grams of sodium nitrate, how much sodium chloride can be formed
what mass of CH3CO2H is required to prepare 100.00ml of a 0.48M acetic acid solution?
Calculate the values of the rate constant k assuming that the reaction is first order
Propane is often used for gas grills and is typically purchased by filling a propane tank with 20 pounds of propane. What is the enthalpy change when 18 pound of propane is burned?
A chemist titrates 20.00 mL of 0.2000 M HBrO ( Ka= 2.3 x 10^-9) with .1000 M NaOH. What is the pH? A) Before any base is added? B) When [HBrO] = [ BrO-] C) at the equivalence point
Sodium carbonate reacts with hydrochloric acid as shown below in an unbalanced chemical equation. What mass of CO2 is produced from the reaction of 2.94g Na2CO3 with excess HCL
explain the main concept behind the VSEPR theory of molecular shape. how do both number and type of electron pairs influence the shape of a molecule?
2 NH3 + CH3OH → products . How much NH3 is needed to react exactly with 21 grams of CH3OH
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