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what volume will 454 grams of hydrogen occupy at 1.05 atm and 25 C
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Please help me with this one I just don't get it.
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A gold bar has a volume of 738 {\rm cm^3} and a density of 19.3 {\rm g/cm^3}.
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How many grams of Na3PO4 will be needed to produce 450 mL of a solution that has a concentration of Na+ ions of 0.900 it M?
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What is the molecular formula for the compound containing 30.4% nitrogen and 69.6% oxygen by mass and having a molar mass of 92.0 g?
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What is CoCl2 used for
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A total of 2.00 g of a compound is allowed to react in a foam coffee cup that contains 103g of water. The reaction caused the temperature of the water to rise from 21.0C to 24.7C . What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself.
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Given that 1 atm = 760 torr, and for an ideal gas, P = ( RT)/M, find the density of F2 gas at 20.00C and 188 torr. (Hint: assume that F2 is an ideal gas, P = pressure, R = gas constant =82.06 cm3 atm mol-1 K-1, T= temperature and = density) (15 Points)
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Calculate the percent yield of if the reaction produces 171 of C2H5Cl
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How many moles of ions are in 2.70 mol of K2SO4?
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Sample Questions
- 1. For organic chemistry, what is a concerted shift? How do things like acids or heat affect them? What other factors affect them?
- 2. Which of the following reactions is an acid-base neutralization reaction? Why are the rest of the answers incorrect?
- A. AgNo3 (aq) + NaI (aq) --> AgI (s) + NaNO3 (aq)
- B. S8(s) + 8O2 (g) --> 8SO2(g)
- C. Na3PO4 (s) + 2H2O (l) --> H2 (g) + 2NaOH (aq)
- D. Ca (OH)2 (aq) + 2HI (aq) --> CaI2(aq) + 2H2O (l)
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