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Tungsten trioxide (WO3) has a rich yellow color and is often used as a pigment in ceramics and paints. In order to test a ceramic vase for its WO3 content, a 10.00 g sample of the vase was ground and reduced with Pb(Hg) to convert any WO3 to W3 . The resulting W3 was transferred to 500.0 mL of 1.00 M HCl. A 100.00 mL aliquot of the HCl solution required 12.64 mL of 0.08362 M potassium permanganate (KMnO4) to reach the purple endpoint. A blank required 0.13 mL. Balance the reaction below and determine the percent WO3 in the ceramic sample.
Which of the intermolecular forces is the most important contributor to the high surface tension shown by water and What is the quantum of light called?
What is the Cl ? concentration just as Ag2CrO4 begins to precipitate when 2.0 M AgNO3 is slowly added to a solution containing 0.048 M Cl ? and 0.048 M CrO42-?
Carbon dioxide makes up approximately 0.04% of Earth's atmosphere. If you collect a 2.8 sample from the atmosphere at sea level (1.00 ) on a warm day (28), how many molecules are in your sample
Explain why trans-1,2-difluoroethane is a non-polar molecule that while cis-1,2-difluoroethane is a polar molecule. Acrylonittrile has the formula CH2=CH-CN. Draw a line bond formla for acrylonitrile and label sigma bonds, pi bonds, which carbon at..
Buckminsterfullerene C60 crystallizes in a face-centered cubic arrangement. If potassium atoms fill all the tetrahedral and octahedral holes, what is the formula of the resulting compound?
When 280. mL of 1.50× 10-4 M hydrochloric acid is added to 125 mL of 1.75 × 10-4 M Mg(OH)2, the resulting solution will be
the elemental mass percent composition of ascorbic acid (vitamin C) is 40.92% C, 4.58% H, and 54.50% O. Determine the empirical formula
The flask shown here contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 0.300 M NaOH. A. What volume of NaOH is needed to reach the end point of the titration?
The boiling temperature is found to be 157 C(760 torr) as the first small amount of distillate is collected. The standard vapor pressures of n-propylcyclohexane and n-propylbenezene are known to be 769 toor and 725 torr
Magnesium oxide decomposes into magnesium and oxygen. If 16.12 of magnesium oxide decomposes to form 9.72 of magnesium, what mass of oxygen gas is also released in the reaction
a 50 ml solution containing NaBr was treated with excess AgNo3 to precipitate 0.2146g of AgBr. what is the molarity of NaBr in the solution.
The small bubbles that form on the bottom of a water pot that is being heated (before boiling) are due to dissolved air coming out of solution.Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen ga..
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