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1. A sample of helium gas occupies 120 mL at 71 mmHg. For a gas sample at constant temperature, determine the volume of helium at 45 mmHg. Show your work.
2. If one strand of a DNA double helix has the sequence ATCGATCGAT, what is the sequence of the other DNA strand?
3. Polyethylene is a polymer found in many applications, including packaging for fruit and vegetables. Discuss the structural differences between (1) polyethylene and (2) polypropylene and (3) polyvinylchloride and how the structure impacts their commercial use
4. Tantalum (Ta), with a mass number of 185 and an atomic number of 73, decays by beta emission. Identify the product of the nuclear reaction by providing its atomic symbol, mass number and atomic number
Problem- Consider the titration of 100.0 mL of 0.0200 M acetic acid (pKa = 4.76) with 0.100 M NaOH. Determine the pH at the equivalence point.
A) Determine the [OH-] of a 0.16 M ammonia solution. B) Determine the pH of a 0.16 M ammonia solution. C) Determine the pOH of a 0.16 M ammonia solution.
When the reaction, Br2(aq) ? Br-(aq) + BrO3-(aq) is balanced in aqueous acidic solution, what is the ratio of BrO3- to Br-
In acid based titration, 33.65mL of an 0.148 M M HCL solution were required to neutralize 25.00 mL of a NaOH solution . What is the molarity of the NaOH solution
The second law states that the entropy of the universe (system and surroundings) increases in a spontaneous process : delta Ssyst + delta Ssurr is greater than or equal to 0.
0.90g of hydrogen chloride (HCl) is dissolved in water to make 6.5L of solution. What is the pH of the resulting hydrochloric acid solution
Calculate the ΔE of thew combust on of 1.90 g of the sucrose.
Draw the skeletal structure for the major organic product formed when 1-butyne reacts with 2 equivalents of HBr
What is the partial pressure of chlorine gas once equilibrium has been established?
Why electroplating takes place on the cathode and electro refining takes place on the anode?
What you observed upon the addition of NH3(aq) to magnesium chloride solution / what species are present in the test tube?and what happened when we add NH4Cl?
A rock is found to contain 84.2% of the amount of uranium-238 that it contained when it was formed. (The amount that the rock contained when it was formed can be deduced from the presence of the decay products of
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