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a Sample of MgCl2 is known to be contaminated with NaCL. A 3.47 portion of the sample is dissolved in water and treated with an excess AgNO3 solution. THe precipitate is filtered off, dried and weighed. The dried precipitate weighs 10.3g. Calculate the amunt of MgCl2 in the original sample (in weight percent).
Is there an easy way to get a quick and dirty comparative coefficient of friction for water vs a solution of sodium bicarbonate and water? I only have the most basic of chemistry skills. Is there a chart you could point me to?
Why do primary alkyl halides undergo SN2 substitution reactions more rapidly than do secondary or tertiray alkyl halides?
The baker uses the flour to make bread & sells the bread to households for RS. 6.00. The households eat the bread. What is the value added in each stages of production?
The solubility product of lead chromate is 2.0x10^-16 calculate the solubility in moles per liter of lead chromate in each of the following solutions:
added 5 mL of 0.10 M H2SO4 instead of 5mL 0.10 M of HCl calculate the ph of the solution using henderson-hasselbalch
Why were some people attracted to the Communist party during the 1930s? Identify and explain the positions the party supported. Please ensure the essay is APA format and its 300-500 words.
How did the automobile change America both geographically and socially? Please make sure the essay is 300 to 500 words in APA format. Also can you please use this as one of your reference?
How can you outline a multistep synthesis of trans-stilbene (Ph-CH=CH-PH) using benzaldehyde
This can be expensive if a researcher is to go by accepted sampling standards. What is your experience? Should cost of sampling override quality of research?
Note that in some cases, the "product" may be the result of a proton transfer reaction. Do not assume that an aqueous workup (H3O+) is performed unless it is specified
The vapor pressure of carbon tetrachloride, , is 0.354 atm and the vapor pressure of chloroform, is 0.526 atm at 316K . A solution is prepared from equal masses of these two compounds at this temperature.
If 5.78 mol of ethane (C2H6) undergo combustion according to the unbalanced equation C2H6 + O2 = CO2 + H2O how much oxygen is required?
Explain the effect of that mistake on the calculated molarity MB. (Will the experimental MB calculated by Student A be higher or lower than the true MB value?)
what mass of Na2SO4 is needed to prepare 350. ml of a solution having a sodium ion concentration of 0.125 M.
An ethylene glycol solution contains 21.2 g of ethylene glycol in 85.4 ml of water. Compute the freezing point and boiling point of the solution. (Assume a density of 1.00 g/mL for water)
the decomposition of N2O5 in carbon tetrachloride proceeds as follows: 2 N2O5 -> 4 NO2 + O2. The rate law is first order in N2O5. At 64 degree celcius the rate constant is 4.82 x 10^ 3 s ^ -1.
Assume an average minimum daily requirement for calcium is 1150 mg. Calculate what percentage of your daily requirements could be met by drinking 1.0L of your local water.
A 47.0 mL sample of gas in a cylinder is warmed from 28 degrees Celsius to 91 degrees Celsius. What is the final temperature?
If you have 400mL of .5 M NH3, how many moles of .47 M HCl must be added to the ammonia solution to reach the equivalence point.
how many moles of glucose, C6H12O6 can be burned when 60.0 mol of O2 is available?
When a ketone is treated with LiAlH4 followed by addition of water, what general class of product results?
How many moles of NaHCO3 and CH3COONa are necessary to produce 425 mL of CO2?
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