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Determine the ammonium ion concentration of a solution that results when 4.53 g of (NH4)2SO4 is dissolved in 100 mL of water.
Which of the following m/z values is the molecular ion for 2-butanone A. 15 B. 29 C. 43 D. 57 E. 72
Assume that the liquid is an ideal solution and apply Raoult's law to find the following. What is the temperature of the liquid
Calcium in a mineral was analyzed five times by each of two methods. Are the mean values significantly different at the 95% confidence level? Method1: 0.0271 0.0282 0.0279 0.0271 0.0275 Method2: 0.0271 0.0268 0.0263 0.0274 0.0269 Chemistry
an experiment requires 40.0 of ethylene glycol a liquid whose density is 1.114 . rather than weigh the sample on a
Calculate H of this reaction per mole of H2SO4 and KOH reacted. (Assume that the total volume is the sum of the individual volumes and that the density and specific heat capacity of the solution are the same as for pure water
Write a balanced equation including states of matter for the reaction of Zn(H2O)4 2+ in aqueous NaCN. You can assume sodium is a secator ion and does not need
a mixture of gas with a total pressure 760mmhg having each of the given gasesco2 ar o2at the indicated partial
In the titration of 68.0 mL of 1.0 M methylamine, CH3NH2 (Kb = 4.4 10-4), with 0.49 M HCl, calculate the pH under the following conditions.
The equation for the reaction is CaCO3(s) + 2HCl(aq) arrow CaCl2(aq) +H2O(l) +CO2(g) The excess HCL (aq) is titrated by 6.45 mL of 0.125 M NaOH(aq). Calculate the mass percentaageof CaCO3(s) in the sample.
the normal respiratory rate for a human being is 15 breaths per minute. the average volume of air for each breath is
with a solution in them connected by a liquid salt bridge junction filled with KNO3. In one solution you have a graphite electrode that is connected with a wire to a copper electrode in the second soution. The soution in contact with the graphite ..
using a compound contains 30.06 percent oxygen and 69.94 percent iron . determine its molecular formula if the molar
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