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1. If liquids droplets were left condensed on the inside flask walls, will the experimental molecular weight be higher, lower, or no different than the actual molecular weight? 2. if the flask is not dried prior to measuring the mass of the flask after it has been removed from the hot water bath will the experimental molecular weight be higher, lower, or no different, than the actual molecular weight? 3. if the no-hole rubber stopper is not placed firmly in the flask when the one-hole rubber stopped is replaced by the no-hole rubber stopper (so air enters the flask) will the experimental molecular weight be higher, lower, or no different than the true molecular weight? 4. if the mass of the gas is found by subtracting the mass of the flask plus the stopper and moist air from the mass of the flask plus stopper and unknown gas, will the experimental molecular weight be higher, lower, or no different than the true molecular weight?
calculate molar solubility of strontium ion when solid sr(OH)2 is in equilibrium in aqueous sol. ksp=1e-7
A solution of this complex in a 1 cm cuvette had an absorbance of0.760 at this wavelength. Calculate the molarity of this solution.
What is the stoichiometric coeffiecient for oxygen gas when the following reaction is balanced using the smallest whole number coefficients? C12H26(g) + O2(g) --> CO2(g) + H2O(g)
Calculate a) the amount of ethylene glycol required. b) the amount of by product evolved and c) the amount of polyester produced.
You have been asked to review the calculations of an assistant with respect to the calculation of the internal energy of CO2. The assistant looked up the enthalpy of CO2
A pipet delivers 10.5, 10.3, 10.9 and 10.7 ml. (a)find the mean volume and deviation from the mean for each and calculate the average deviation from the mean. (b) calculate the relative deviation (in %) for this set of data.
When 8.6 g of toluene is mixed with 9 g of pure nitric acid, only 6.7 g of trinitrotoluene (TNT) is recovered from the mixture when it is separated from other undesired byproducts. What is the percent yield of the synthesis? C7H8 + 3 HNO3(l) ? C7H..
In a solution of NH3, the concentration of NH3 is 0.01 M, Kb is 1.8 x 10-5. What is the concentration of the hydroxide ion
For the titration of 50.00 mL of 0.02000 M 2-(N-Morpholino)ethanesulfonic acid with 0.09900 M NaOH, calculate how much titrant (mL) is required to reach a pH of 9.29 mL in the receiving flask.
Which of the substances S8, CaCl2, SOCl2, NaF, CBr4, BrCl, LiF, and AsH3 are: (a) Largely ionic? (b) nonpolar covalent? (c) polar covalent
Using oxidation and reduction half-reactions, balance the skeletal equation: N_2H_4(g) + ClO_3 -(aq) --> NO(g) + Cl-(aq) of hydrazine with chlorate ions.
What is the total number of liters of O2(g) produced from the complete decomposition of 0.500 mole of KClO3(s)?
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