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Write an equilibrium expression for each chemical equation involving one or more solid or liquid reac- tants or products. 1. 2C(s)+O2(g)===2CO(g) Use A for [C], B for [O2], C for [CO] 2. C(s)+CO2(g)===2CO(g) Use A for [C], B for [CO2], C for [CO] 3. CO^2-3(aq)+H2O(l)===HCO^-3(aq)+OH^-(aq) Use A for [CO^2-3], B for H2O, C for [HCO^-3, D for [OH^-]. 4. HCHO2(aq)+H20(l)===H3O^+(aq)+CHO^-2(aq) Use A for [HCHO2],B for [H2O], C for [H30^+], D for [OH^-]
A solution is prepared by dissolving 179 g sucrose (C12H22O11) in enough water to produce 1.15 L solution. What is the molarity of this solution?
In a test tube, 10 mL of 0.100 M KI and 10 mL of 0.100 M Na2CO3 are mixed. Next, 0.10 M lead nitrate is added drop wise. What will be the concentration of CO3 2- when PbI2 first starts to precipitate? Ksp (PbCO3) = 1.5 x 10^-13 Ksp (PbI2) = 8.7 x 1..
A 4.000-g sample of the metal nitrate M(NO3)2 was dissolved in water and treated with excess aqueous sodium sulfate. The sulfate salt that formed weighed 3.318 g. Determine the identity of the metal.
Mg3N2 + 6H2O ----> 3Mg(OH)2 + 2NH3 When 36.0g of H2O react, how many grams of NH3 are produced?
Hardness in groundwater is due to the presence of metal ions, primarily Mg2 and Ca2 . Hardness is generally reported as ppm CaCO3 or mmol/L Ca2 . To measure water hardness
What is ?H in MJ for the combustion of 1.99 L of octane producing CO2(g) and H2O? The heat of combustion of octane is -5.45 x 103 kJ/mol.
A voltaic cell is constructed by immersing a strip of silver in a 1.0M AgNO3 solution and a strip of cadmiun metal in a 1.0M Cd(NO3)2 solution. The circuit is completed by a wire and a salt bridge in the usual way. Write the balanced half-reaction..
Draw on a P-V diagram the following processes. Label accurately each point in the four steps of the cycle using p,V,T for variables e.g. Va. The working substance is a perfect gas. Start from A. Show direction of change using arrow heads.
The concentration of an enzyme within a cell is extremely low relative to other material present, yet functions effectively in its metabolic role.
When 76.0 grams of calcium and 36.9 grams of nitrogen gas undergo a reaction that has a 90.0% yield what mass of calcium nitride is formed?
Some of the formulas below could be either molecular or empirical formulas; however, some could only be molecular formulas. Which of the following formulas must be molecular formulas
12.00mL of 0.125M of HCl is required to titrate 21.55mL of Mg(OH)2. Calculate the molarity of the unknown base.
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