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Using a Table of Thermochemical Data, calculate ΔS for the following reaction. Is entropy increasing or decreasing? Is the system becoming more random or less random? Based on entropy changes only, would you predict the reaction to be spontaneous or not?
Na (s) + ½Cl2 (g) → NaCl (s)
You have been provided with a 0.1M aqueous solution of glycine at pH 9.0. Calculate how much (in ml) of 5M NaOH solution that you must add to 1 L of this 0.1M glycine solution in order to bring its pH to exactly 9.80
typically when a person coughs he or she first inhales about 2.40 l of air at 1.00 rm atm and 25 circ rm c. the
Energy level of electrons in atoms - The 3s level in hydrogen has a lower energy than the3d level in hydrogen.
A solution is made that is 1.1×10^?3 M in Zn(NO3)2 and 0.150 M in NH3. After the solution reaches equilibrium, what concentration of Zn2+(aq) remains
Name the compounds MnCl2, SCl2, and CaBr2. Explain the use or omissions of the Roman numeral (II) and the prefix di-.
Question- A chemist needs a buffer with a pH 3.50. How many mL of pure formic acid (density=1.220 g/mL) must be added to 325 mL of .0857 M NaOH solution to obtain such a buffer
What is the product in a base catalyzed aldol condensation reaction between: 2 mmols acetone and 8 mmols benzaldehyde? 2 mmols acetone and 8 mmols 4-methylbenzaldehyde
Identify compound Z in the following sequence. (CH3)2CHCH2CN ---HCl, H2O, heat---> compound X ---1. LiAlH4, diethylether, 2. H20 ---> compound Y --- PCC, CH2Cl2 ------> compound Z 1. (CH3)2CHCH2COH (the O is double bonded to the C)
10-ml volumetric flask an empty weighs 10.263 grams.nbsp the mass is 20.211 grams after filling to the mark with
Write a balanced equation for the reaction involved in the synthesis of aspirin from salicylic acid.
What concentrations of [K2HPO4] and [KH2PO4] will you need to make the total concentration 0.50 M? 3.) How many moles of K2HPO4 and KH2PO4 will you need? 4.) What mass of K2HPO4 and KH2PO4 will you need?
show the calculation for the percent yield of K3[Fe(C2O4)3].3H2O using your actual yield and the theoretical yield
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