In an experiment, 26.0 g of metal was heated to 98.0°C and then quickly transferred to 150.0 g of water in a calorimeter. The initial temperature of the water was 20.5°C, and the final temperature after the addition of the metal was 32.5°C. Assume the calorimeter behaves ideally and does not absorb or release heat.

What is the value of the specific heat capacity (in J/g•°C) of the metal?

1.Balance the redox reaction first ( it is in basic medium)

ClO^-(aq) + CrO2^-(aq) -----> Cl^- (aq) +CrO4^-2(aq)

2. A titration experiment is set up to use .185M bleach (NaOCl) to analyze CrO2^-.If 50.0mL of the CrO2^-(aq) solution required 32.53mL of bleach to react to completion, what would you calculate as the molarity of the CrO2^- solution?

Using Ellman’s reagent, find the number of cysteines in a protein that has a concentration of 30 mg/ml solution with a molecular weight of 15,000 Da. Data-- 0.1 ml of the protein was reacted with the reagent and diluted to 10 ml and the absorbance at 412 nm was 1.4 A. Hint, first find the moles of protein used for the experiment, then calculate the moles of Ellman’s reagent that reacted

I know that there's big controversy between two groups of physicists:

1. those who support string theory (most of them, I think)
2. and those who oppose it.

One of the arguments of the second group is that there's no way to disprove the correctness of the string theory.

So my question is if there's any defined experiment that would disprove string theory?

Suppose you want to test how fair is the coin. You conduct the following experiment. You flip the 2 coins multiple times and observe HH - 23 times, HT - 24 times, TH - 37 times, and TT - 34 times. What is the Test Statistics to test the Null Hypothesis that the coin is fair against the alternative hypothesis that the coin is unfair?

A researcher plans to conduct a marketing experiment to decide which shampoo has the better floral scent considering only two brands, "red" shampoo or "pink" shampoo. A sample of 190 people were chosen assuming that they can distinguish between the different scents. What are the symmetrical limits of the population percentage within which the sample percentage is contained with a probability of 90%?

Percent yield of alkyl halide (Show all calculations for limiting reactant, theoretical yield and percent yield.) Note I have 1.746g of product obatined of pure alkyl halide Also my unkown that i chose for this experiment was 3-methyl-1-butanol---- I started with 18.996g---15.281g after reflux-- 14.993g after IR spectroscopy

3. If you have colonies of two colors and sizes on your LB/amp/ara +pGLO plate, is there any noticeable pattern in the distribution of these colonies? If so, describe what you see.

4. On which of the four plates would you expect to find wild type E. coli growing? What purpose does this plate serve in the design of this experiment?

Isolation and Recrystallization of Aspirin Experiment. If the melting-point range of my purified aspirin is 129 - 131 degrees Celsius, and pure aspirin melts at 135 degrees Celsius. Which of the following best describes the purity of the aspirin I isolated?

a. Very pure.

b. More pure than the impure sample but still contains impurities.

c. Very impure.

Explain

Question )

a) Briefly state an explanation of what the helical spring in simple harmonic motion and its concepts are in min 300 words? (In word text, no pictures)

b) What is the Aim of The helical spring in simple harmonic motion experiment where in oscillations of 30 how long it takes or the time it takes for each set of weights is measured?(min 100 words)