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Ammonia is produced by the reaction of hydrogen and nitrogen N2(g)+3H2(g)--->2NH3(g). a) How many moles of H2 are needed to react with 1.0 mol of N2? b) How many moles of N2 reacted if 0.60 mol o
Copper has two naturally occurring isotopes. Cu-63 has a mass of 62.939 amu and relative abundance of 69.17%. Use the atomic weight of copper to determine the mass of the other copper isotope. Expre
In a chemical cold pack, two substances are kept separate by a divider. When the divider is broken, the substances mix and absorb heat from the surroundings. The chemical cold pack feels cold.
Write all of the mole-mole factors for each of the following equations: a) 2Al(s)+3Cl2(g)--->2AlCl3(s); b) 4HCl(g)+O2(g)--->2Cl2(g)+2H2O(g).
Calculate the total mass of reactants and products in each of the following equations: a) 2Al(s)+3Cl2(g)--->2AlCl3(s); b) 4HCl(g)+O2(g)--->2Cl2(g)+2H2O(g).
Describe each of the following equations in terms of 1)number of particals and 2)number of moles: a) 2Al(s)+3Cl2(g)--->2AlCl3(s); b) 4HCl(g)+O2(g)--->2Cl2(g)+2H2O(g).
How many molecules of oxygen react with 133 molecules of acetylene (HCCH) to produce carbon monoxide and water
Acetic acid is a monoprotic acid and thus the reaction stoichiometry is 1:1. that is one mole of sodium hydroxide will neutralize one mole of acetic acid.
A copper wire with a mass of 4.32 g reacts with sulfur to form 5.41 g of a copper sulfide compound. a) Determine the number of moles of copper and sulfur in the compound. b) Determine the empirical
A mixture of helium, nitrogen, and oxygen has a total pressure of 758 mmHg. The partial pressures of helium and nitrogen are 232 mmHg and 197mmHg , respectively. What is the partial pressure of oxyg
How does the addition of 10 ml of 1M KCl change the solubility of Ca(OH)2 in an aqueous solution
Given a free energy change for a reaction of -0.125 kcal/mol, what is the equilibrium constant at 18 degrees C (r=8.314 J/mol*K)
What is the limiting reactant when equal masses of iron(III) chloride and potassium phosphate react in solution?
A chemist needs to determine the concentration of a solution of nitric acid HNO3, She puts 865mL of the acid in a flask along with a few drops of indicator. She then slowly adds 0.600M Ba(OH)2 to th
For the chemical equations shown below, label each reactant as either acid or base, and each product as either conjugate acid or conjugate base according to the Brønsted-Lowry definition.
The activation energy of an uncatalyzed reaction is 91kJ/mol . The addition of a catalyst lowers the activation energy to 61 kJ/mol .Assuming that the collision factor remains the same, by what fact
Write out steps necessary to make ch3o=cch2ch3 starting with ethyne and any other chemicals
What is the theoretical yield (in grams) of the precipitate when 22.35 g of barium nitrate reacts in solution with 11.37 g sodium carbonate
Carbonated cola is more acidic than coffee or even orange juice because cola contains phosphoric acid. What is the molar concentration of H3O^+ in a cola that has a pH of 3.120
Acetylene (C2H2) can be produced from the reaction of calcium carbide (CaC2) with water. Draw the localized electron orbital model (hybridized orbital model) for the acetylide anion (C22-), showing
Burning a straight chain alkane in oxygen gas yields a reaction: CnH(2n+2) + aO2 = bCO2 + cH2O determine the factor "a" as a function of "n" for equations where n is equal to or greater than 1.
A beam of electrons (m= 9.11e-31 kg/electron) has an average speed of 2.4e8 m/s. What is the wavelength of electrons having this average speed in pico meters
A 50 mL sample of 0.06M HC3H5O2 (propanoic acid) is titrated with 20 mL of 0.07M NaOH. What is the pH at this point of the titration? (Ka of HC3H5O2 = 1.3*10^-5)
Describe how you will separate the following mixture of ions in solution. Use complete sentences and include all the details but be brief and concise in all your procedures. Include an explanation/
Solid sodium chlorate is heated to form solid sodium chloride and oxygen gas; c) Butane gas (C4H10) react with oxgen gas to form two gaseous products, carbon dioxide and water.