A 5.274 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 11.99grams of CO₂ and 4.909 grams of H₂O are produced.

In a separate experiment, the molar mass is found to be 116.2 g/mol. Determine the empirical formula and the molecular formula of the organic compound.

Enter the elements in the order C, H, O

You are isolating C. elegant genomic DNA to b used in a subsequent experiment to amplify osm-3 gene by PCR. You add worms to a tube containing lysis buffer and proteinase K, and then use the PCR machine to hold the tube at 65°C for 90 minutes and then at 95°C for 15 minutes. What is the purpose of these two temperature steps?

Let’s say there is a gene known as X that is expressed in the developing forebrain and midbrain (located anteriorly), and a gene known as Y that is expressed in the developing hindbrain (located posteriorly). Describe one experiment to confirm that another gene, Z, which encodes a transcription factor, activates the expression of Y but represses the expression of X in the developing hindbrain; be sure to include your expected result.

At 326°C,1,3-butadiene dimerizes according to this equation: 2C₄H₆---->C₈H₁₂

In a given experiment, the initial pressure of 1,3-butadiene was 632.0 torr. Using the data table below, calculate the order of the reaction and the rate constant.

At 326°C,1,3-butadiene dimerizes according to this equation: 2C₄H₆---->C₈H₁₂

In a given experiment, the initial pressure of 1,3-butadiene was 632.0 torr. Using the data table below, calculate the order of the reaction and the rate constant.

What is the initial concentration of Bleach if you used 5% in a Run where 2 mL's are used with 25 mL's of Dye?

Answer: 0.72 M

For this experiment, it is important to:

a) Make the concentration of Dye large compared to that of the Bleach
b) Make the temperature of all the runs the same
c) Change the activation energy for each trial
d) Change the temperature for each trial

This experiment consisted of:
- Phosphoric Acid 2 mL
- Methyl Anthranilate 0.21 mL
- Sodium Nitrite 0.399 g
- Diethyl Ether 3 mL
- Urea ~0.14 g
- Sodium Bicarb 1 mL

As well as sodium sulfate, but that was "as needed".

At the end, I had 0.05 g of the final product.

How do I begin to calculate the percent yield?

The enthalpy of reaction for HCN(aq) + OH^-(aq) -> CN^-(aq) + H₂O(l) is -12.1 kJ/mol. Assuming that the correct enthalpy of reaction of the experiment is -54.0 kJ/mol, calculate the enthalpy change for the ionization of HCN:

HCN(aq) -> H⁺(aq) + CN^-(aq)

Be sure to report your answer to the correct number of significant figures.

ΔH = ____ kJ/mol

why is neglecting to do a final rinse of the stirring rod with poluceman into the beaker containing the accumulated copper of error in the experiment. What would the effect of this error be on your mass of copper? what would the effect of this error be on the ratio of mol Cu or Mol Fe
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i cannot read the hand writing

A student was performing an experiment to demonstrate the photoelectric effect. When the student shined light from the source on the metal surface, no electrons were ejected. Which of the following could explain the observed result? Select one: a. The light intensity was insufficient. b. The energy of the light was too high. c. The frequency of the light was too low. d. The wavelength of the light was too short.