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A 10.0 mL sample of H₂SO₄ was exactly neutralized by 13.5 mL of 1.0 M KOH. What is the normality of the H₂SO₄?
H2O -> H2 + O2
A.How many moles of O2 are produced when 1.26 moles if H2O is reacted?
B. How many moles of H2O are needed to produce 55.7 moles of H2
C. If enough H2O is reacted to produce 3.40 moles of H2 then how many moles of O2 must have been made?
If the percentage yield is 1.92%, what mass of KC7H5O2 can be expected?
For which one of the following reactions is ΔrxnH° equal to the heat of formation (ΔfH°) of the product?
1.give the coordinates of the foci , vertices and covertices of the ellipse wih equation x²/169 + y²/25 = 1 sketch the graph and include these points
2.find the equation in standard form of the ellipse whose foci are F1(-8,0) and F2 (8,0) such that for any point on it, the sum of its distances from the foci is 20.
3. An ellipse has vertices (-10,-4) and (6,-4) and covertices (-3,-9) and (-2,1). Find its standard equation and its foci.
What is the quantum number that describe the 4d orbital?
What is the pH of a solution with [H^+] of 1.0 x 10^9M? What is its pOH? (Kw = [H^+][OH^-])
1. When baking soda was mixed with vinegar, effervescence was observed.
What caused the effervescence?
2. How can you conclude that the reaction has gone to completion?
3. Which balloon has the least amount of air inside?
4. Which balloon has the most air inside?
5. Will the balloon size grow bigger if more vinegar is in the bottle? Why?
6. Will it take more time to complete the reaction if there were more vinegar in the bottle with the
same amount of baking soda?
7. Which is the limiting reagent?
8. Which is the reagent in excess?
Differentiate between conductance and conductivity of an electrolytic solution.
What are degrees of freedom? What is the maximum number of degrees of freedom possible for a one-component system?
