12/06/17

Is 1-chloro-3-phenylpropane a vinyl chloride
Its a question of chemistry. 11th class of iit entrance exam  
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12/05/17

how many moles of CO2 are formed from 25.0 moles C2H2
5C2H2(g) + 2O(g)= 4Co(g) + 2H2O
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12/05/17

We performed a lab that involved the single displacement of copper(II)hydrate with aluminium.
 One question asks; If you wanted to use aluminium as the limiting reagent, what changes in the procedure would be made? What visible evidence would you look for. The actual limiting reagent is... more
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12/05/17

studying for finals please help ASAP
you have just bought a tropical fish for your freshwater aquarium unfortunately you don’t realize it is a salt water fish using your knowledge of osmosis explain why this fish will not survive in... more
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12/05/17

how is polyethylene broken down into diesel through pyrolysis if polyethylene is (C2H4)n and diesel is C12H24?
i want the exact chemical reaction 
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12/05/17

A person can become addicted the first time she or he uses cocaine
Please tell me it's argent I have my exams tomorrow I have to pass so tell me the answer 
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12/04/17

Erika is twice as old as James. The sum of their ages is 48 less than 5 Times James’ age. How old are Erika and James?
I just wrote everything in the question box.
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12/04/17

Provide a balanced equation for the hydration of boric acid, H3BO3(s), a weak electrolyte
need help with balancing hydration equations for weak electrolytes
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12/04/17

What mass of solute must be added to the solution to correct the concentration
A student prepares a 250 ml of 1.35 M solution of magnesium chloride for an experiment. His lab partner accidentally dilutes the solution with an additional 125 ml of water 
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12/04/17

How would temperature affect the vapour pressure of a non polar solvent
 Give example and description 
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12/04/17

Determine the concentration of dissolved oxygen in the lake in ppm
Dissolved oxygen gas levels in a polluted lake have dipped dangerously low to a concentration of 8.023•10^-4 M
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12/04/17

What volume of concentrated acid and what volume of water would be required to create such a solution
Sulphuric acid is sold in standard stock solutions of concentration 14.5M. A teacher needs to prepare 175 ml of a 2.3M solution of sulphuric acid.
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12/04/17

Preparing 5 dilutions of 0.200M NiSO4?
I’m supposed to be preparing five dilutions from 50.0 mL of 0.200M NiSO4 stock solution. Instructions say that I will need standard solutions with five different concentrations and all standards... more
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12/03/17

What was the concentration of the unknown HClO4 solution? The neutralization reaction is: HClO4(aq)+NaOH(aq)→H2O(l)+NaClO4(aq)?
A 35.0 mL sample of an unknown HClO4 solution requires 42.3 mL of 0.101 M NaOH for complete neutralization. What was the concentration of the unknown HClO4 solution? The neutralization reaction... more
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12/03/17

How do I use the localized electron model to describe the bonding in the following compounds?
H2O CCl4 H2CO C2H2
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12/03/17

Can I mix and cook Vitamin 12 supplement 'Newron' in vegetables?
My family is vegetarian and I feel there is deficiency of vitamin b12 in family but no one is ready to take it.So, I need to give it to my family in any way.Please help.
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12/03/17

Convert the following energy units.
a) 3.80 × 10^2 kj to J.   b) 6.09 × 10^6 J to kcal. 
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12/03/17

A 205 −mL sample of ocean water contains 6.9 g of NaCl?
What is the molarity of the solution with respect to NaCl?
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12/03/17

A soft drink contains 28 mg of sodium in 305 g of H2O?
What  the concentration of sodium in the soft drink in mass percent?
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12/03/17

I need to calculate the molar extinction coefficient for phycocyanin.
I have a calibration curve, with the equation of the line, and the concentrations of the plotted points, with absorbency plotted against concentration (mg/ml) How do I solve using the Beer Lambert... more
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12/03/17

Consider the reaction between HCl and O2: 4HCl(g)+O2(g)→2H2O(l)+2Cl2(g) When 63.1 g of HCl are allowed to react with 17.2 g of O2, 46.1 g of Cl2 are collected.
A. Determine the limiting reactant for the reaction.Express your answer as a chemical formula.   B. Determine the theoretical yield of Cl2 for the reaction.   C. Determine the percent yield for... more
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12/03/17

How many ml of 1.0 M NaOH solution are needed to neutralize 100 ml of 2.0 M H2SO4 solution
Please help with chemistry 
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12/03/17

How can I avoid decreasing solubility while increasing ph?
How can I avoid decreasing solubility while increasing ph?I have a drug that is soluble in water, when increasing the pH, it breaks down and becomes insoluble (formulates a cloudy white solution),... more
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12/02/17

Preparing 5 dilutions of 0.200M NiSO4?
I’m supposed to be preparing five dilutions from 50.0 mL of 0.200M NiSO4 stock solution. Instructions say that I will need standard solutions with five different concentrations and all standards... more
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12/02/17

Acids are helpful because they are not corrosive and can be used to protect metals from corrosion
Elements, Compound, Mixtures
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