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How to calculate experiment yield and theoretical yield for this problem?
How to calculate experiment yield and theoretical yield for this problem?
If a student were to recover 22% trimyristin from a 10.0g sample of nutmeg, answer the following questions:
1. What is the experimental/actual yield of trimyristin from this solid/liquid extraction?
2. If you utilized a saponification (hydrolysis) reaction to generate myristic acid and glycerol from the recovered trimyristin (see hydrolysis reaction scheme below), what w
Chemistry   920073545   2633   Asked 9 years ago
How do you rank these base sets from most basic to least basic?
How do you rank these base sets from most basic to least basic?
Can someone help with ranking these compounds in each base set from most basic to least basic? Thank you!
Chemistry   920073545   3264   Asked 9 years ago
Rank the solvent systems best to worst in SN1 reactions.
Rank the solvent systems best to worst in SN1 reactions.
The solvent systems are: 1:1 ethanol: water, 1:1 methanol: water, 1:1 1-propanol: water, and 1:1 acetone:water. Which solvents work from best to worst in SN1 reactions and why?

Thank you!
Chemistry   920073545   1626   Asked 8 years ago
What is the molariy of the resulting solution?
What is the molariy of the resulting solution?
25ml of a 0.388M solution of sodium sulphate is mixed with 35.3 ml of 0.229M sodium sulphate .what is the molarity of the resulting solution? Assume the volume are additive
Chemistry   Abdlallah   911   Asked 8 years ago
A solution is made containing 8.50 g CH3OH (density = 0.791 g/mL) in
A solution is made containing 8.50 g CH3OH (density = 0.791 g/mL) in
2)   A solution is made containing 8.50 g CH3OH (density = 0.791 g/mL) in                                250 g H2O (density = 1.00 g/mL).  Calculate:

Chemistry   aholmes   1850   Asked 8 years ago
Using Hess's Law and any necessary information from your Data Booklet, calculate
Using Hess's Law and any necessary information from your Data Booklet, calculate
combustion of ethene
Using Hess's Law and any necessary information from your Data Booklet, calculate the molar enthalpy of reaction for the combustion of ethene in kJ/mol.
C2H4+ 3O2 ---> 2CO2 + 2H2O
Chemistry   aisha1   364   Asked 8 years ago
How would the amount of NaOH differ if the concentration of the NaOH were doubled?
How would the amount of NaOH differ if the concentration of the NaOH were doubled?
Doing Virtual Chemlab 6-3 : Concepts in Acid-Base Titrations and I'm not really understanding the question my teacher is asking.

The next question she asks is: "How would the amount of NaOH differ if the concentration of the HCl were doubled?"

Any ideas? Please help! Thank you!
Chemistry   Andalyne   522   Asked 7 years ago
Dissolution Rate Constant
Dissolution Rate Constant
2 grams of sugar (solubility = 4.20 g/mL water at 90°C) was added to a travel mug of coffee (500 mL) and half the sugar dissolved with stirring in 100 secs.
The sugar had a surface area of 6 x 10^(-3)m^2(approx 1mm^3 grains).
Calculate the dissolution rate constant for the sugar assuming steady state conditions.
Chemistry   andzo   718   Asked 11 years ago
What is the product of the following reaction?
What is the product of the following reaction?
1. What is the product of the original reaction as shown?
2. If Br is replaced with Cl, what would be the product?
3. If Br is replaced with I, what would be the product?
(Three total answers)
Chemistry   angsthussler100   615   Asked 8 years ago
How does the rate of an E2 Elimination reaction affected by the ff. conditions?
How does the rate of an E2 Elimination reaction affected by the ff. conditions?
Conditions:
1. Reactant Structure: bromocyclohexane, chlorocyclohexane, iodocyclohexane
2. Base Strengths: 1.0 mL sodium ethoxide diluted with 1.0 mL ethanol as opposed to the original which is 2.0 mL sodium ethoxide
3. Temperature: reflux vs room temperature.
*Please provide specific explanations (even a 3 year old will understand) on how each factors affect the
Chemistry   angsthussler100   820   Asked 8 years ago
Comparing Fuels for a camp stove
Comparing Fuels for a camp stove
Comparing Methane and Butane as Camp Stove Fuels
Provide all the relevant balanced chemical reactions that you need to use in order to compare the two fuels from an energy stand point
Provide all the relevant calculations needed to determine which of the two fuels is best from an energy point of view
 
I have the balanced chemical equations but I'm not sure
Chemistry   Arii_bell   543   Asked 8 years ago
Fluorescence Spectroscopy
Fluorescence Spectroscopy
Fluorescence Spectroscopy
(i) Fluorescence resonance energy transfer (FRET) is widely used in biology as a molecular ruler (i.e. to estimate distances between two fluorescent molecules). A FRET donor-acceptor pair had a Förster distance of 7.2 nm. If the efficiency of energy transfer between the donor and acceptor was 10%, what is the distance between the donor and acceptor?
Chemistry   bananas.red   213   Asked 3 years ago
Coordination Chemistry.
Coordination Chemistry.
(a)
A chemist is given three bottles, each containing a pure sample of one of the three complexes, Na3[Co(CN)6], Na3[-Fe(C2O4)3] or Na3[CoF6] (C2O4 represents the bidentate, dianionic oxalato ligand). However, the bottles are not labelled and the chemist is asked to quickly determine which bottle contains which complex by carrying out for each sample measurements involving: (
Chemistry   bananas.red   194   Asked 3 years ago
Coordination Chemistry.
Coordination Chemistry.
(b)
When inspecting the structures of the metal-metal bonded complex ions [Mo2Cl8]4-, [Re2Cl8]2-, and [Os2Cl8]2-, it is observed that the chlorido ligands on the metal centres have an eclipsed arrangement in [Mo2Cl8]4- and [Re2Cl8]2-, but they are staggered in [Os2Cl8]2-.
(i) Draw a molecular orbital energy level diagram (obtained by overlap of the appropriate d-orbitals)
Chemistry   bananas.red   217   Asked 3 years ago
chemistry question
chemistry question
(2.) How do soaps work? Describe their chemical properties and give an example (including chemical formula) of a particular soap.

Need ASAP thanks
Chemistry   bcretired   620   Asked 11 years ago
solution for lab 5 SCN131
solution for lab 5 SCN131
Suppose you were required to make a solution by diluting 15.0 mL of an aqueous solution to a final volume of 500 mL.
(4 pts.) Describe, in as much detail as possible, the entire dilution process from beginning to end as described in this lab. How are the two solutions properly mixed together? What is the role of the meniscus in this process?

Chemistry   bcretired   1256   Asked 11 years ago
Boiling point and heat removal
Boiling point and heat removal
If the boiling point is recorded when the liquid enters the capillary tube (after heat is removed), will it be recorded to high or to low? Explain.
Chemistry   beardy   549   Asked 10 years ago
please help
please help
we know that 0.89% saline (NaCl) solution is isotonic with blood .In real-life emergency, you run out of physiological saline solution and have only KCL as a salt and distilled water . would it be acceptable  to make a 0.89% aqueous KCL solution and use it for intravenous infusion ? explain
Chemistry   berfrye   746   Asked 12 years ago
where 126 and 135 are counted numbers and 1.364 and 0.8951 are measured numbers
where 126 and 135 are counted numbers and 1.364 and 0.8951 are measured numbers
where 126 and 135 are counted numbers and 1.364 and 0.8951 are measured numbers is
Chemistry   bfresh   1854   Asked 9 years ago
Calculate the molar enthalpies of reaction for the reactions occurring in
Calculate the molar enthalpies of reaction for the reactions occurring in
Part A -
Mass of Mg(s): 0.31 g
Initial temperature of calorimeter contents: 24.1 ºC
Final temperature of calorimeter contents: 36.8 ºC

Part B -
Mass of MgO(s): 1.22 g
Initial temperature of calorimeter contents: 24.0 ºC
Final temperature of calorimeter contents: 31.9 ºC

1) Calculate the molar enthalpies of reaction for the react
Chemistry   biochicka   399   Asked 9 years ago
Design an experiment you could carry out to test the hypothesis that changing the catalyst will not
Design an experiment you could carry out to test the hypothesis that changing the catalyst will not
Design an experiment you could carry out to test the hypothesis that changing the catalyst will not affect the production of biodiesel.
Chemistry   biochicka   1202   Asked 8 years ago
The concentration of hydronium ions, i.e. (H3O+), in a solution is measured
The concentration of hydronium ions, i.e. (H3O+), in a solution is measured
The concentration of hydronium ions, i.e. (H3O+), in a solution is measured to be 8.6x10^-9 mol/L. What is the pH of the solution? Is this solution an acid or a base?
Chemistry   biochicka   406   Asked 8 years ago
How much of this acid is required to prepare
How much of this acid is required to prepare
20% (w/w) of H2SO4, has a specific gravity of 1.14.
How much of this acid is required to prepare 

a) 1000ml 4M H2SO4


b) 1000ml 4n H2SO4


Chemistry   biostudent123   272   Asked 9 years ago
Draw the Major product formed when two structures undergoe Dehydrohalogenation
Draw the Major product formed when two structures undergoe Dehydrohalogenation
Draw the major organic product's formed when the structure's shown below undergoe dehydrohalogenation in alcoholic KOH with heat

I attached images of the structures.


Post Merge: 9 years ago

I took out H and Halogens and added a double bond.

Thank you.
Post Merge: [time]14
Chemistry   biostudent123   719   Asked 9 years ago
Calculate the molar solubility of CaF2 in a solution containing 0.250 M Ca(NO3)2.
Calculate the molar solubility of CaF2 in a solution containing 0.250 M Ca(NO3)2.
Solution:



Then you sub. those into the x values to find their individual concentrations.

Hope that helps!
Chemistry   bio_man   2308   Asked 3 years ago
Which of the following statements about dilution is TRUE?
Which of the following statements about dilution is TRUE?
Which of the following statements about dilution is TRUE?

The number of moles of solute remains constant after dilution.

The number of moles of solute decreases after dilution.

The number of moles of solute increases after dilution.

All of these

None of these

** Thoughts:

Upon dilution, i.e.
Chemistry   bio_man   171   Asked 2 years ago
Lewis Structures and Molecular Models
Lewis Structures and Molecular Models
These are questions for a pre-lab and I do not understand how to do these at all. I talked to the teacher and he only gave me the definitions and told me to think about what it is asking for. Thanks for the help!!!

1.  Ozone absorbs ultraviolet light in the upper atmosphere thus protecting us from sunburn.  Down at ground level however, ozone is a pollutant whic
Chemistry   Boedecjt01   522   Asked 7 years ago
Reactivity
Reactivity
Give an explanation for the order of reactivity observed for the three saturated alkyl halides with Ag+.

2-Methyl-2-propyl (1 sec) Allyl  (1 sec) 2-Butyl (2 sec)
Chemistry   Brii   5533   Asked 12 years ago
saturated alkyl halides
saturated alkyl halides
Explain the order of reactivity for the three saturated alkyl halides with I-
Chemistry   Brii   4705   Asked 12 years ago
Technetium-99m emits only gamma radiation? Why would this type of radiation be used in diagnostic imaging?
Technetium-99m emits only gamma radiation? Why would this type of radiation be used in diagnostic imaging?
rather than an isotope that also emits beta or alpha radiation?
Please help
Chemistry   bugmenot1   1682   Asked 11 years ago
Need help with stereochemistry !!
Need help with stereochemistry !!
Can anyone help with these problems and explain why it is what it is?! thanks

Explain whether the following pairs of structures are Diastereomers, Enantiomers, or Identical.

Chemistry   centimetergrove   298   Asked 10 years ago
Calculate the molar enthalpy change of neutralisation of potassium carbonate. Assume that all ...
Calculate the molar enthalpy change of neutralisation of potassium carbonate. Assume that all ...
When 2.76g of potassium carbonate were added to 30.0cm^3 of 2.0mol/dm^3 hydrochloric acid, the temperature rose to 5.2°C. Write the equation for this reaction. Calculate the molar enthalpy change of neutralisation of potassium carbonate. Assume that all solutions have a density of 1.0g/cm^3
Chemistry   Christianah   458   Asked 6 years ago
have a couple questions can anyone answer them?
have a couple questions can anyone answer them?
   If the Constitution was written today, given what we now know about science and technology, particularly chemistry (and even more specifically biochemistry and molecular biology), what do you think it would include/not include, and why?
   How would it be different? Would there be a rewording based on what we know now? If so, how and wherein? There are lots of things to think a
Chemistry   Cupcake16   475   Asked 10 years ago
For the reaction of carbon dioxide to form carbon monoxide and oxygen, ΔH is 570
For the reaction of carbon dioxide to form carbon monoxide and oxygen, ΔH is 570
For the reaction of carbon dioxide to form carbon monoxide and oxygen, ΔH is 570 kJ. How many grams of CO2 will react if 450 kJ is absorbed: 2CO2 (g) → 2CO (g) + O2
(g)    ΔH= +570 kJ
Chemistry   Dantheman13   1243   Asked 8 years ago
Calculate the energy lost by photons Compton scattered at 45°, 90° and 135° for incident photons of energies 5?
Calculate the energy lost by photons Compton scattered at 45°, 90° and 135° for incident photons of energies 5?
Calculate the energy lost by photons Compton scattered at 45°, 90° and 135° for incident photons of energies 50 keV and 100 keV.   What fraction of the photon's energy is lost in each case?   Present your results in a table.   What conclusions can you make about the effect of photon energy on the fraction of energy lost?
Chemistry   Deeps39   607   Asked 10 years ago
Calculating the Potential of Solution, this makes me sick!!?
Calculating the Potential of Solution, this makes me sick!!?
You are titrating 50.00mL of solution containing 0.100mol/L Co2+ with 0.100 mol/L Ce4+ titrant at 25 degree celcius.
Eo Ce4+, Ce3+ = 1.44 V    ---------------------------    Eo Co3+, Co2+ = 0.855V

Calculate the potential of the solution after the addition of
i) 25.00mL
ii) 50.00mL
iii) 75.00mL of the titrant
Assume unit activity coefficients for all species.

Please let me know wh
Chemistry   desiinuk   327   Asked 10 years ago
Raoult's Law
Raoult's Law
Could someone please help with this? Slight Smile

Chemistry   ehd123   587   Asked 10 years ago
Index of Hydrogen deficiency
Index of Hydrogen deficiency
If we had nitrogen atoms in the molecular formula of a compound, how would the hydrogen deficiency be calculated?

How would it be calculated if the formula had an 0xygen atom?

HD = 2 may mean that the compound has 2 rings, or 1 triple bond, or 2 double bonds, or 1double bond and a ring.

What does the HD= 3 mean?
What does HD = 4 mean?
Wh
Chemistry   ehd123   523   Asked 9 years ago
Scientists make nanofibers using fridge magnet and ferrofluid
Scientists make nanofibers using fridge magnet and ferrofluid
Researches from the University of Georgia, Princeton University and Oxford University report a new method for nanofiber production using a permanent magnet and ferrofluid – magnetospinning. Results of this research are published in Advanced Materials journal - onlinelibrary.wiley.com/doi/10.1002/adma.201500374/abstract

A ferrofluid is a colloidal dispersion of stabilized
Chemistry   ella_maru   1054   Asked 8 years ago
How much molar / grams of citric acid is required to remove 100ppm lead from soil
How much molar / grams of citric acid is required to remove 100ppm lead from soil
 how much molar / grams of citric acid is required to remove 100ppm lead from contaminated soil?
Chemistry   Elza   761   Asked 9 years ago
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