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A laboratory has a 2.0-mol sample of pure selenium and a 2.0-mol sample of pure chromium. How many more grams of selenium than chromium does this represent?
The reuseable booster rocket of the U.S space shuttle emplot a mixture of aluminum and ammonium perchlorate for fuel. A possible equation for this reaction is: 3Al(s)+ 3NH4ClO4(s) --> Al2O3(s) + AlCl3(s)+3NO3(g)+ H2O(g)
Aluminum hydroxide reacts with sulfuric acid as follows: 2 Al(OH)3 (s) + 3H2SO4 (aq) rightarrow Al2(SO4)3 (aq) + 6H2O (l) Which reagent is the limiting reactant when 0.700mol Al(OH)3 and 0.700mol H2SO4 are allowed to react?
Write balanced nuclear equations for (a.) the loss of an alpha particle by thorium- 230 and (b.) the fission of U- 235 to give Ba- 140, two neutrons, and another nucleus.
A 3.00 L container at 25 C contains 0.464 atm of CO2. When graphite is added to the container, some CO2 is converted to CO and at equilibrium the total pressure is 0.746 atm.
The dissociation equilibrium constants for the protonated form of alanine (a diprotic amino acid H2X+) are ka1=4.6 x 10^-3 and ka2= 2.0 x 10^-10 What is the pH of 50.00 mL of a 0.100 M solution of alanine after 100.00 mL of 0.100 M NaOH has been a..
A) A 0.030 M solution was prepared by dissolving dipotassium cysteine K2C in water. After that 40.0mL of this solution was titrated with 0.060 M HClO4.
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 14.4 g of carbon were burned in the presence of 50.6 g of oxygen, 12.2 g of oxygen remained unreacted. What mass of carbon dioxide was produced
Explain what is the hydronium-ion concentration in a solution formed by combining 150mL of 0.10 M NaOH with 50mL of 0.30 M HCl
Draw the Newman projection formulas for the conformations of 2- methylbutane that are obtained by looking down the C2-C3 bond. Rank then oorder of relative stability
CaCO3(s) CaO(s) + CO2(g) H°rxn = 175 kJ How will the amount (not concentration) of CaCO3(s) change with the following stresses? CO2(g) is removed. CaO(s) is added. The temperature is increased. The volume of the container is decreased.
Calculate the Gibbs energy,entropy, and enthalpy of mixing when 1 mole C6H14(hexane) is mixed wth 1 mol C7
The atomic mass in g mol of Fe=55.85, S=32.07 O=16, calculate the number of moles of the negative ions present in 7.45g of iron (III) sulfate.
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