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In the analysis of 0.5 g sample of Feldspar , a mixture of chlorides of Na and K are obtained , which weighs 0.1180 g. subsequent treatment of mixed chlorides with AgNO3 gives 0.2451 g AgCl . what is % of Na2O and K20 in feldspar.
before addition of any HCl (b) after addition of 25.0 mL of HCl (c) after addition of 50.0 mL of HCl (d) after addition of 100.0 mL of HCl
If you had a stoppered flask with basic luminol and then opened it to the air, why would the chemiluminescence be more pronounced than with the flask stoppered? Why is the chemiluminescence even more pronounced with the ferricyanide/hydrogen perox..
A solution of chloroform (CHCL3) in carbon tetrachloride (CCL4) is 1.87 molar chloroform and has a density of 2.93 grams/mL. Calculate
Look up IDLH and provide a brief description. As well as identifying the IDLH values of the following chemical Carbon Monoxide Hydrogen Sulfide Xylene
The potential energy associated with being a given height above the Earth%u2019s surface is mgh. Using this definition of potential energy, determine the ratio for the pressure at height h (Ph) to the pressure at height h = 0 (P0).
What can make the titrated solution at the equivalence point in an acid-base titration have a pH not equal to 7
a 0.5078g sample of impure nitrobenzene was treated with 1.044g of tin. when the reaction was complete the residual tin
The tarnish on a teapot is a result of the silver metal reacting with the oxygen in the air according to 4Ag(s) + O2(g) -> 2 Ag2O(s),\quad \Delta H = -62. kJ/mol
A balloon is floating around outside your window. The temperature outside is 21 degrees celsius, and the air pressure is 0.800atm . Your neighbor, who released the balloon, tells you that he filled it with 3.30 moles of gas. What is the volume of ..
If 0.334 g of water was obtained from the equation N*M H2O ?N + M H2O, how many grams of the hydrate were heated
Based on crystal field theory, which of the subsequent metal ions will not be colored when placed in an octahedral crystal field
Potassium metal reacts with water to give potassium hydrozide and hydrogen gas. If 50.0 mL of hydrogen gas is produced at STP, what is the mass of potassium that reacted? 2 K9s) + 2H2O(1) -2KOH(aq) + H2(g)
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