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Atomic Masses. (6 pts) An element has two naturally occurring isotopes: Isotope A has a mass of 120.9038 amu and a relative abundance of 57.4%; isotope B has a mass of 122.9042 amu. What is this element, and what is its atomic mass? 34. Grams and Moles. (4 pts) What is the mass of 15 moles of CO2 in grams?
Organic Reactions - Cyclopentadiene, Why is cyclopentadiene monomer more stable at higher temperatures although dicyclopentadiene (dimer) is more stable at lower temperatures?
If a sample containing 2.00 mL of nitroglycerin ({rm{density}} = 1.592{rm{g/mL}}) is detonated, how many total moles of gas are produced?
propane, C3H8, is common fuel used for cooking and home heating. What mass of O2 is consumed in the combustion of 1.00g of propane. I am having a hard time getting the balanced equation for this to solve the rest
Sodium nitrate was added to 2.0 L of water at 25 °C to produce a saturated solution. The solution was then heated to 80 °C. Calculate the mass of lead nitrate that had to be added to produce a saturated solution at that higher temperature.
How many types of nonequivalent protons does the following compound contain
If the hydrolysis to the diacid is not complete, how could you separate the desired diacid from the unhydrolyzed anhydride by extraction. Discuss the chemistry involved.
The density of the sample is 1.01 g/mL. The titrant is 1.017 M NaOH. The average volume of titrant required to titrate 25.00 mL subsamples of the vinegar is 20.78 mL. What is the concentration of acetic acid in the vinegar? Express your answer the..
determine how many moles of cation are produced when 6.46 grams of nh4cl is dissolved?nbspcompute the difference in the
What is the change in total pressure within the chamber following the reaction? Assume a constant temperature throughout the process.
Use the particle-in-a-one-dimensional-box model to calculate the longest-wavelength peak in the electronic absorption spectrum
A 1L steel tank has a safety valve that opens when the internal pressure exceeds 850 torr. The tank is filled with He at 23 oC and 0.991 atm.
When the following reaction is balanced in acid solution using the lowest possible whole number coefficients, the coefficient of H+ will be: S8 + NO3- --> S4O62-+ NO2
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