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The radioactive decay of T1-206 toPb-206 has a half-life of4.20 minutes. Starting with 5.00 x1022 atoms of T1-206, calculate the number of atoms left after 42.0 minutes.
Consider a saturated solution of Zinc arsenate, Zn3(AsO4)2, in which the following reactions can occur: Zn3(AsO4)s (s) --> 3Zn+2 + 2AsO4 -3 Ksp=1.0e-27 AsO4 -3 + H2O ---> HAsO4 -2 + OH- Kb1=3
Calculate and compare the rms speeds of CO and Cl2 at 300. K. rms speed of CO m/s rms speed of Cl2 m/s
In a mixture of helium and chlorine, occupying a volume of 15.9L at 822.6 mmHg and 53.2 C, it is found that the partial presure of helium is 424.8 mmHg. What is the total mass of the sample
Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition
Permanganate ion will oxidize Cr3+ in acidic solution to produce Mn2+ and what other product. The answer is dichromate, but why.
The sensitivity of a spectrophotometer allows detection of 1 percent of one colored form of an indicator for example HIn in the presence of 99 percent of the other colored form In-. Based on this fact, over what pH range relative to its pK can an ..
A compound contains 14.5 g of magnesium and 3.5 g of oxygen. What is the mass percent of oxygen in the compound?
If a chemist wants to make 1.3 l of 0.25 m solituion of KOH by diluting a stock solution of 0.675 m KOH, how many milliters of the stock solution would the chemist need to use
dissolve CsI in liquid HF dipole-dipole forces dispersion forces hydrogen bonds ion-dipole forces ion-ion interparticle forces metallic bonds. melt potassium metal dipole-dipole forces dispersion forces hydrogen bonds ion-dipole forces ion-ion interp..
A 0.150- M solution of chloroacetic acid (HC2H2ClO2) has a pH of 1.86. What is the value of Ka for this acid and the percent ionization?
A 5.00 % m/m glucose solution has d = 1.02 g/mL. What is the mass of glucose in 362 mL of the solution.
The central atom has 4 electron domains. d) The central atom has 5 electron domains. e) The central atom has 2 electron domains.
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