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Which of the following m/z values is the molecular ion for 2-butanone? A. 15 B. 29 C. 43 D. 57 E. 72
If a radiation source has an intensity of 700 rem at 2.00m, what distance is needed to decrease the intensity of exposure to below 25 rem
The mass spectrum of an organic compound shows the relative abundances of M to be 62.87% and M 1 to be 4.760%. Assuming the peaks are caused by 12C and 13C isotopes,
Identify the element or elements that undergo
when 25.0ml of .500m h2so4 is added to 25.0ml of 1.00m koh in a coffee cup calorimeter at 23.50 degree celcius the
Determine the specific heat of a metal object of 19 grams that is heated to 96 degrees Celsius and added to a calorimeter containing 75 grams of H 2 O at 18 degrees Celsius.
at 600 degrees c the equilibrium constant for the reaction 2hgos --gt 2hg l o2 g is 2.8. calculate the equilibrium
calculate the heat absorbed by 15.0 g of water to raise its temperature from 20.0oc to 50.0oc at constant pressure. the
A student added 27.20 cm^3 of 0.200 mol dm^-3 HCL to 0.188 g of eggshell. Calculate the amount, in mol, of HCL added. what is it?
Brine is a heavily salted solution used for pickeling. What tests could be used to identify the ions present? What should uoi see
A gas sample was collected over water at 25.3 degrees C. The total pressure is determined to be 0.97 atm. What is the partial pressure of the gas that was collected
How much HCl gas can be produced at STP by reacting 198 g of NaCl with excess H2SO4?NaCl + H2SO4 ! NaHSO4 + HCl.
When a sample of aqueous hydrochloric acid was neutralized with aqueous sodium hydroxide in a calorimeter, the temperature of 100.0 g of water surrounding the reaction increased from 25.0°C to 31.5°C.
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