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A solution of ammonia and water contains 1.90×10^25 water molecules and 5.20×10^24 ammonia molecules. How many total hydrogen atoms are in this solution
The 1H NMR indicates there are three non-equivalent types of hydrogen atoms in your final compound with peaks at ~ 7.30 (m), 4.30(s), and 3.90(s) ppm. The three non-equivalent types of hydrogen atom
5 grams of propane are reacted with O2 and CO2 and H2O are produced. How many grams of H2O can be produced by the complete reaction of the 5 grams of propane with excess Oxygen
An aluminum foil package contains 75 square feet of foil that weighs 12 ounces. Aluminum has a density of 2.70 g/cm^3. What is the approx thickness of the foil in mm
Calculate the molar density at this pressure at 310. What fraction of the gas phase molecules initially present for 1.0 in the chamber are present at
The buret continues to drain, slowing gradually until coming to a complete stop, as depicted on the right side. At that moment, the total pressure of the gases inside the flask just equals the total
Potassium chlorate, when heated in the presence of a catalyst, MnO2, generates oxygen gas and potassium chloride solid residue. If the oxygen generated by completely heating 5.00 g of potassium chlo
Determine the pressure of the gases trapped in the closed end of a manometer apparatus if the water column which separates the closed end from the open end is 10.55 cm higher on the closed end than
An astrology-loving friend hypothesizes that people born in that week like horror movies more than other genres of movies. You decide to use the scientific method to test this hypothesis.
The mass percentage of hydrochloric acid within a solution is 10.00%. Given that the density of this solution is 1.049 g/mL, find the molarity of the solution.
Give the answer ect number of significant figures. Translate the "E" below into "x 10" to the power of whatever numto the corrber follows it. for example, 6.8 E +01 is 6.8 x 10^1
A hypothetical compound XY has an actual molar mass of 62.8562 g/mol, but it was experimentally determined to have a molar mass of 63.0196. Calculate the absolute and relative errors.
a calculator to calculate the average and standard deviation for x1 through x12. i know how to find the average but i dont understand how to findthe standard deviation.
Why does the 13C NMR show five different types of carbon atoms when the molecular formula indicates the compound contains seven carbon atoms
In the fingerprint region of the IR spectrum, what do the absorptions at 746 and 688 cm-1 tell you about the substitution pattern of this compound
Calculate the concentration of iron (II) chloride contaminant in the original groundwater sample. Round your answer to significant digits.
At a dosage of 18 micrograms/kilograms body weight, how many milligrams of digitalis should a 180 lb. patient receivec
Based on activation energies and energy changes and assuming that all collision factors are the same, answer the following questions: Which of the following reactions would be fastest in the forward
A .464 g sample of a metal, M, reacts completely with sulfuric acid according to M+H2SO4 yields MSO4+H2. A Volume of 211 mL of H is collected over water, the water level in the collecting vessel is
Does nitro compounds cause any harmful effect on living things?
The elements X and Y form a compound that is 66.67% X and 33.33% Y by mass. The atomic mass of X is twice that of Y. What's the empirical formula?
A Volume of 211 mL of H is collected over water, the water level in the collecting vessel is the same as the outside level. Atm Pressure is 756 Torr and the temp is 25 degree C. Calculate atomic mas
If the standard heat of rxn for the rxn is calculated to be -567.4 kJ/g mol FeS2(s) what is the value of Delta Hrxn will you use per kg of FeS2 burned in an energy balance
The decomposition of nitric oxide NO to N2 and O2 is second order with a rate constant of 0.0796 M^-1 S^-1 at 737 C and 0.0815 M^-1 S^-1 at 947 C. Calculate the activation energy.
For the elementary process N2O5 (g) = NO2(g) + NO3 (g) the activation energy (Ea) and overall Delta E are 154 KJ/mol, and 136 KJ/mol, respectively. What is the activation energy of the reverse react