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Q1. If 21.64mL of 9.44×10-4M KMnO4 solution is required for the titration calculate how many mgs of Ca2+ are present in 12.0mL of blood?
Q2. Determine the percent yield 5.04 grams of H2 and 28.0 grams of N2 are reacted in this reaction N2 + 3 H2 → 2 NH3, forming 17.8 grams of Ammonia (NH3). ?
essentially converted to Cu(NH3)4 2+ ion, the voltage of the cell (E) goes up to 0.883 V and the Cu electrode is still negative. Find the residual concentration of Cu2+ ion in the cell.
a. Provide equation for the complete combustion of ethylbenzene. b. Provide an equation for the partial combustion of acetylene. c. If 100 kg o both material where available, which hydrocarbon (ethylbenzene or acetylene) would produce the most wat..
What mass of this substance must evaporate in order to freeze 250 of water initially at 25? (The heat of fusion of water is 334 the specific heat of water is 4.18 .)
The density of silver is 10.5 g/mL. What is the mass (in grams) of a piece of silver with a volume of 23.6 mL
Write the balanced net ionic equation for the following dissolution reaction: Zn(OH)2 in aqueous NaOH
A solution of 97 mL of 0.207 M KOH is mixed with a solution of 185 mL of 0.153 M NiSO4. How much precipitate forms? What is the concertration of each ion upon completion of the reaction. MK+ , MNi 2+, M sulfate ion, M OH-
Assume that you used a 0.560 g piece of pure aluminum in the synthesis of alum and collected 5.255 g of dry alum. What is your percent yield of alum
List and describe briefly the 2 methods which are used by drug companies to discover lead compounds
A 100. mL sample of 0.200 M aqueous hydrochloric acid is added to 100. mL of 0.200 M aqueous ammonia in a calorimeter whose heat capacity (excluding any water) is 480. J/K. The following reaction occurs when the two solutions are mixed.
How much energy would be absorbed or re- leased by the H2O in the process 30 grams H2O(g) at 100?C → 30 grams H2O(l) at 20?C.
in an organic compound % of carbon is 75.2%,% of hydrogen is 10.75 and % of oxygen is 14.03..Find the empirical formula of compound?
A 494 mL sample of hydrogen gas was collected over water at 25°C and a pressure of 753 torr. If the pressure of water vapor is 24.0 torr at 25.0°C, what mass of hydrogen gas (g) was collected? Do not enter units with your answer.
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