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If 2.078 g of Smarties® requires 2.11 mL of 0.250 M Na2CO3 to reach the endpoint, how many moles of acid is there in each gram of the candy?
suppose that 1.431 g of impure baoh2 is dissolved in enough water to produce 196 ml of solution and that 39.5 ml of
The melting point range is measure for two materials (A and B). For material A, the melting point range is from 58.5 C to 64.0 C whereas for material B, the melting point range is from 87.0 C to 89.0 C. Which material, A or B, is more pure
suppose you have a buffer at ph 5.0 that is 1.00 m in hx and 1.00 m in x- where hx is a weak acid with ka 1.0 x 10-5
The statements in the following multiple choices deal with the concept of equilibrium. Choose the statement which is true. a) At equilibrium the speed of a reaction equals its rate constant.
What is the ultraviolet catastrophe? Explain why it was predicted and why this prediction
Calculate the energy of attraction (in eV) between a cation with a valence of +2 and an anion with a valence of -3,
Question- You wish to make a 0.413 M hydrochloric acid solution from a stock solution of 3.00 M hydrochloric acid. How much concentrated acid must you add to obtain a total volume of 175 mL of the dilute solution? answer in mL
"If the crystal field splitting (Δo) is 3.44×10-19 J for a cobalt compound, what wavelength of light (in nm) is absorbed when an electron from a lower energy d orbital is promoted to a higher energy d orbital? What color will the cobalt compound a..
What is the equilibrium constant Kc for the reaction below. Assume temperature is 25oC. ( Represent the reaction below as a sum of reactions and then combine the corresponding K values to obtain Kc for the reaction below.)
How much heat is required to raise the temperature of 7.50 grams of water from 10 degrees celcius to 55 degrees celcius
Given a stock solution of a food dye having a concentration of 1.0 x 10-5 and an absorbance of 0.700. If a new solution is made by diluting exactly 10.0 mL of the solution with exactly 15.4 mL of distilled water, what should the absorbance of the ..
if there are 45 drops of alcohol/mL, and the density of alcohol is 0.789g/mL. what is the blood alcohol concentration?
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