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How vulcanisation does changes the chareter of natural rubber
Water autoionizes to produce hydronium ion and hydroxide ion. The product of the concentrations of these ions equals the water autoionization constant, Kw. This ionization constant depends on temperature, the enthalpy change, and the entropy chang..
Decribe how to prepare 2.0 liters of a .20 M NaOH solution from 50%. (w/w) Naoh solution that has a density of 1.53 g/mL, and doing all measurements by volume, not mass.
Suppose a 500 mL solution contains 0.50 millimoles of Co(NO3)2, 100.0 millimoles of NH3, and 175.0 millimoles of ethylenediamine. What is the concentration of Co 2+ (aq) in the solution?
How much CH4, in grams, is needed to produce 50.0 grams of CHCl3?
The density of carbon in the form of diamonds is 3.51 g/cm^3. If you have a 40-carat spherical diamond, what is the diameter of the diamond in millimeters?
Assume you take a sample of 13.6 g Al and oxidize it (in an excess of O2) to produce 12.07 g of Al2O3. Calculate the percent yield of Al2O3. Reaction: 4 Al + 3 O2 → 2 Al2O3.
Diphosphorus pentoxide is added to water Hydrogen sulfide gas is bubbled through a solution of silver nitrate.
3.5 g of a hydrocarbon fuel is burned in a vessel that contains 250. grams of water initially at 25.00 C. After the combustion, the temperature of the water is 26.55 C.
In one of your laboratory experiments, you determine the equilibrium; you determine the equilibrium constant for this process, at 225, is 7.048E-72. You are given a table of data that indicates the standard heat of formation (ΔHo Form) of Cu2O is ..
A chemist had a substance which was either X (m.p = 52 degrees Celsius) or Y (m.p = 110 degrees Celsius). He place the substance in a test tube and puts the test tube in a beaker of boiling water. The substance melted. Explain what is the substanc..
write a balanced chemical equation for the reduction of dl-camphor by NaBH4. Assume all H of NaBH4 are used in the reduction.
If the energy needed to raise the temperature of the water to 29.0 degrees Celsius is obtained from the combustion of methane (CH4), what volume of methane, measured at STP, must be burned
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