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A mineral has a face centered cubic arrangement of its atoms and an edge of the unit cell is 565.685 pm. the density of this mineral is 11.008 g/mL. Determine the radius of an atom, the packing efficiency, and molar mass.
Compute the molar concentration of Cl- in the standard KNO3 solution if the flask is rinsed only one time with distilled water.
which you might separate (a) K+ from Ag+, (b) Ba2+ from Pb2+, (c) NH4+ from Ca2+, and (d) Ba2+ from Cu2+. All cations are assumed to be in aqueous solution, and the common anion is the nitrate ion.
the uncatalyzed decomposition of hydrogen peroxoide is first order with an activation energy of 75.3 kj/mol and a half life of 6 hrs at 40 degrees celcius.
benzene ring with a 2 carbonyl joined by an O in the middle and a iso propal group is on the other carbonyl. (would be a symmetric anhydride if it weren't for the benzene and isop-ropral substituents on the two carbonyls)
What is the value of Î"Go in kJ at 25 oC for the reaction between the pair: I2(s) and Br-(aq) Use the reduction potentials for I2(s)
how many liters of softened water containing a sodium concentration of 5.8times10-2 sodium by mass have to be consumed
The activation energy for a given reaction is 87 kJ/mol. What is the ratio of the rate constants for this reaction when the temperature is decreased from 37 °C to 15 °C
Find the empirical formulas for compounds with the following compositions: a. 8.74% magnesium, 91.26% iodine b. 36.86% nitrogen, 63.14% oxygen
Calculate the amount of water that must be supplied to a heat exchanger that cools 100 kg/hr of tomato paste from 90C to 20C. The water enters the heat exchanger at a temperature of 8oC
A 0.1276 g sample of a monoprotic acid (molar mass=1.10 x 10^2) was dissolved in 25 mL of water and titrated with 0.0633 M NaOH. After 10 mL of base had been added, the pH was determined to be 5.57. What is the Ka for the acid
what common laboratory test of viscoelasticity does this test most closely correspond? Estimate the average life of the same tubing in the same rupture test at 30 deg C and 37 deg C
I don't understand don't we draw a lewis structure first and add 2 lone pairs to complete the octet making it a tetrahedral. how does it only have 3 covalent bonds
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