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Predict what amount in grams this double replacement reaction when 40ml of Potassium Iodide Pb(NO3)2 (aq) + 20 ml of Lead(II) nitrate 2KI (aq) combine to make --> 2KNO3 (aq) + PbI2 (s) . What is the predicted amount of PbI2 (precipitation)?
The density of silver is 10.5g/cm3 what is the volume im cm 3 of an ingot of silver with mass 0.743 kg. If this sample of silver is a cube how long in each edge in cm
write lewis structures that obey the octet rule for each of the following molecules and ions. in each case the first
What is the lewis structure for NBr3. How many electron pairs in the central atom of NBr3. How many bonding electrons pairs of the central atom of NBr3
The Ka of acetic acid is 1.8 x 10^-5. Calculate the pH of a solution that is composed of 1.0 M CH3CO2H and 0.50 M NaCH3CO2. Can someone please help
A solution is prepared by dissolving 20.0 g of K2HPO4 and 25.0 g of KH2PO4 in enough water to produce 1.0 L of solution. What is the pH of this buffer
What is the sum of the stoichiometric coefficients the formation reaction for methanol (CH3OH). Enter any fraction as a decimal.
Salicylic Acid is used to make asprin. Salicylic acid contains 60.8 mass % Carbon, 4.4 mass % Hydrogen and 34.8 madd % of Oxygen. What is the empirical formula for Salicylic acid?
Assume you 0.010 mol of N2O4 (g) in a 2.0L flask at 50 degrees Celcius. After the system reaches equilibrium, [N2O4] is 0.00090 M. What is the value of Kc for this reaction
average kinetic energy of 6410 J/mol under certain conditions, what is the root mean square speed of Cl2(g) molecules under the same conditions?
gas has a volume of 0.40 L and a pressure of 6.0 atm, what is its kelvin temperature?
which of the following quantum numbers describes the shape of an orbital? A)principal quantum number B)Schrodinger quantum number C) spin quantum number D) Angular momentum quantum number E)magnetic quantum number
consider 54.5 ml of a solution of weak acid ha ka 1.00 10-6 which has a ph of 3.700. what volume of water must be
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