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Determine the empirical formula and the molecular formula of a compound that has the compostion of 80.0% C and 20.0% H. The molecular mass is 240.6 g.
A 13.00 g sample of an ionic compound NaA, where A- is the anion of a weak acid, was dissolved in enough water to make 100.0 mL of solution and was then titrated with 0.100 M HCl. After 550.0 mL of HCl was added, the pH was 5.00.
an unknown organic compound has the empirical formula c2h2o. a solution of 3.775 g of the unknown compound dissolved in
Choose the correct answer of the following, explain why it is true, and explain why the other choices are untrue: (A) high pE is associated with species such as CH4, NH4+, and Fe2+
a retro calculation of the amount of Ni(Nh3)6Cl2 that is needed if 20mL of 0.10M HCl are used to neutralize ammonia. The number I got was 0.07727 g.
Value of E: 1.3 g x 1 mole/100.09=1.29 x 10-2 moleCaCO3 Using the value in your answer to question E., calculate the number of moles of HCl that two TUMS
When pentane C5H12 burns in oxygen, it produces carbon dioxide and water. If 85.5 g of pentane is burned, what voulume of carbon dioxide is produced at STP (The density of CO2 is 1.997 g/L.)
Explain why, in the 1H NMR spectrum of the product, the peak at 2.40 ppm has three times the integral value of all of the other peaks in the spectrum
What is the mole fraction of solute and the molal concentration for an aqueous solution
The density of solid Fe is 7.87 g/cm3. How many atoms are present per cubic centimeter of Fe. As a solid, Fe adopts a body-centered cubic unit cell. How many unit cells are present per cubic centimeter of Fe
A solution is prepared by dissolving 11.60 g of a mixture of sodium carbonate and sodium bicarbonate in 1.00 L of water. A 300.0- cm^3 sample of the solution is then treated with excess HNO3 and boiled to remove all the dissolved gas
The mass ratio of sodium to fluorine in sodium fluoride is 1.21:1. A sample of sodium fluoride produced 36.5 {rm g} of sodium upon decomposition. How much fluorine (in grams) was formed?
how many grams of zinc metal will react with 24.5 ml of 2.0 m hydrochloric acid hcl forming zinc chloride zncl2?
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