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It is found that 1.431 g of element X contains 7.509 × 1021 atoms. The atomic mass of X is? How many protons does it contain? A compound containing only carbon, hydrogen, and oxygen is subjected to elemental analysis. Upon complete combustion, a 0.4266-g sample of the compound produced 0.5518 g of CO2 and 0.2259 g of H2O. What is the empirical formula of the compound?
Calculate the number of grams of alcohol present in 1.00 L of 87 proof gin. The density of ethanol is 0.798 g/mL.
Looking at the table of first ionization energy, if the n=1 shell held 3 electrons max instead of 2, then the first ionization energy for Li(g) would be around _____ MJ/mol.
What is the theoretical yield of ammonia in grams that can be prepared from 41.0 g of nitrogen and excess hydrogen
What is the maximum mass in grams of NH3 that can be produced by the reaction of 1.0g of N2 with 3.0g of H2
Calculate the molar solubility of Pb(IO3)2 in water by systematic method. {ksp for Pb(IO3)2 = 2.5 x 10^-13}
What are the equilibrium concentrations of NH2OH (hydroxylamine), NH3OH+, and OH- in a 0.15 M solution of hydroxylamine (Kb=6.6*10^-9)? What is the pH of the solution
Which of the following correctly describes what happens when the temperature of a chemical reaction is increased? Not: assume that the mechanism for the reaction does not change.
following reactions1 naoh co2 m nahco3 m k12nahco3 h na h2co3 k23 2nahco3 m nahco32 m k3 kis are the rate
iron has a reported average atomic mass of 55.85 amu. if iron has two isotopes one of which has 29 neutrons and an
You carefully weigh out 20.00 g of CaCO_3 powder and add it to 81.00 g of HCL solution. You notice bubbles as a reaction takes place. You then weigh the resulting solution and find that it has a mass of 92.80 g . The relevant equation is
Calculate the final temperature that results when a 13.0 -g sample of water at 23.1C absorbs 870 J of heat.
100 mL of a 0.125 M solution of HBr was titrated with a 0.100 M solution of KOH at 25 C. The equivalence point will be reached after addition of what volume of the titrant?
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