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Chlorine has two stable isotopes, chlorine-35(34.9688 amu) and chlorine-37 (36.9656 amu). If the average mass of chlorine is 35.4527 amu, what is the natural abundance of chlorine-37
a stock solution is prepared by adding 28 ml of 0.2 m na3po4 to enough water to make 76 ml. what is the po43-
What atomic or hybrid orbitals make up the sigma bond between I and I in triiodide ion, I3-?. What is the approximate I-I-I bond angle?
What effect on the value of Ca(OH)2's Ksp (6.5x10^-6 ) would sucking up some suspended calcium hydroxide solid have. Would the Ksp value be higher or lower than the normal value. Why
Write the balanced chemical reaction for the oxidation of sucrose C12H22O11 (s) to carbon dioxide gas and liquid water calculate ?H, ?U, and ?S for the reaction How much of this energy change can be extracted as
What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.518g/L at 25 ?C and 721
A 0.0355 g sample of an unknown molecular compound is dissolved in 1.000 g of liquid camphor at 200.0°C. Upon cooling, the camphor freezes at 157.7°C. Calculate the molar mass of the unknown compound.
What is the movement of electrons in an ammonia and hydrochloric acid reaction?
Many homeowners treat their lawns with CaCO3(s) to reduce the acidity of the soil. Write a net ionic equation for the reaction of CaCO3(s) With a strong acid.
Calculate the standard enthalpy change, the standard entropy change, and the standard free energy change for the reaction: N2 (g) + 3 F2 (g) ? 2 NF3 (g) How will the sign of ?G change as the temperature increases
The root-mean-square (rms) speed of a sample of molecules was found to be 1.8*10^3 m/s at 25.0 degrees C. After heating, the rms speed was found to be 4.6*10^3 m/s. What was the temperature of the sample after heating
How many L of H2 gas (at STP) is produced from 470 mL of 0.36 M HCl and excess Zn? The reaction is: Zn + 2HCl = ZnCl2 + H2
At what temperature would the rms speed of atoms in an Ar(g) sample equal that of atoms in a He(g) sample at SATP
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