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Problem- You have discovered a new element X. There are three isotopes, Xa has a mass of 54.68 g and is 2.36% abundant, Xb has a mass of 53.89 g and is 45.69% abundant, and Xc has a mass of 61.42 g and is 51.95% abundant. What is the atomic mass of the unknown element X?
As much detail as feasible is really appreciated
You add 10.0 mls of 0.100 M H2SO4(aq) to 10.0 mls of 0.100 M NaOH(aq). How many moles of water are formed. Is there a limiting reagent. Select one: a. 0.00200 moles b. 0.00100 moles c. 0.200 moles d. 0.100 moles
Explain under what conditions can liquid CO2 exist. Be specific. Can it exist as a liquid at normal room temperature
Potassium (atomic mass = 30.19 amu) has three isotopes with masses 38.9367 amu, 39.9640 amu, and 40.9618 amu. The abundance of the last isotope is 6.73%. Estimate the abundances of the other two isotopes
25.0 mL of a gas with a pressure of 1.00 atm is contained in a balloon at 25.0 C. The balloon is then cooled to 5.0 C, and the pressure is found to be 0.750 atm. What is the volume of the gas under the new conditions?
The oxygen gas collected over water occupied 53.8mL at a temperature of 25°C and a pressure of 733 torr. Compute the mass percent of NaClO3 in the original sample. If at 25°C the vapor pressure of water is 23.8 torr.
What is the solubility of MX3. MX3 M3+ + 3X1- (Ksp = 2.00e-09) a) in water solubility = M b) in 0.11 M KX solubility = M c) in 0.16 M M(NO3)3 solubility = M
A definite reaction has activation energy of 28.43 KJ/mol. explain at what Kelvin temperature will the reaction proceed 4.5 times faster than it did at 321 K
A particular reaction has a ?Ho value of -118 kJ and ?So of 47 J/mol K at 298 K. Calculate ?Go at 349 K in kJ, assuming that ?Ho and ?So hardly change with temperature
Question- Predict the main/most stable di-nitration product of benzil and draw a mechanims for how the product formed. 1) Would you expect this di-nitration product to above or below the desired product spot (benzil) on a TLC plate
A voltaic cell consists of an Mn/Mn2+ half-cell and a Pb/Pb2+ half-cell. Calculate [Pb2+] when Ecell is 1.017 V and [Mn2+] = 0.589 M. Use reduction potential values of Mn2+ = -1.18 V and for Pb2+ = -0.13 V
What is the molality of a solution in which 25 g of sodium chloride is dissolved in 2.0 kg of water
Calculate the pH of the solution after 10.0, 20.0, and 30.0 mL of acid have been added; pKb of (CH3)3N=4.19 at 25 degrees C
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