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If 2.0*10^-4 moles of dye in 50 mL of solution is consumed in 188 seconds, what is the average rate of consumption of dye in mol/L.s?
Rubidium has two common isotopes, 85Rb and 87Rb. If the abundance of 85Rb is 72.2% and the abundance of 87Rb is 27.8%, what is the average atomic mass of rubidium.
Write a balanced the rmochemical equation for the reaction with an energy term in kJ as part of the equation.
The temperature of the mixture is 0 \rm ^{\circ}C , and the total pressure is 1.00 \rm atm . How many grams of helium are present in the gas mixture?
A compound is 40.0 , 6.70 , and 53.3 by mass. Assume that we have a 100.- sample of this compound.The molecular formula mass of this compound is 180 . What are the subscripts in the actual molecular formula?
The pH would decrease slightly. The pH would decrease dramatically. The pH would increase slightly. The pH would increase dramatically. The pH would not change at all.
Use the mean value that you determined for Keq to calculate the SCN- concentration in a solution Fe3+ concentration was 4.00 X10-2M and initial SCN- concentration was 1.00 X10-3 M. Is all of theSCN- in the form ofFeNCS2+?
To prevent tank rupture during deep-space travel, an engineering team is studying the effect of temperature on gases confined to small volumes. What is the pressure of 3.40mol of gas D measured at 251 C in a 1.75-
the rate constants of some reactions double with every 10 degree rise in temperature. Assume that a reaction takes place at 305K and 315 K. What must the activation energy be for the rate constant to double as described?
How many carbon atoms does the sample contain?
How much work would have been done if the gas were ideal? Account for the differences the two values.
Imagine that you have a 7.00 gas tank and a 4.50 gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch.
Using a table of standard reductions, determine what the potential of each reduction below would be versus the S.C.E. a. Ag+ (aq) + e - ? A(s) b. Ni2+(aq) + 2e- ? Ni (s)
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