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A blend of polyethylene and PVC contains 10 wt °/. PVC. What is the molecular percentage of PVC
Assign oxidation numbers to all the elements in each of the following compounds or polyatomic ions: a)N2O b)LiOH c)SbO2^- d)IO4^-
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
what is the hydrogen ion concetration of a solution that has a pH of 4.7
What would be the resulting molarity of a solution made by dissolving 21.9 grams of KCl in enough water to make an 869-milliliter solution?
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. How much heat is evolved per gram of fuel burned?
The heat of combustion of hexane is 995.0 kcal/mol. How much energy is released during the complete combustion of 453 grams of hexane ?
What is the %Cu (by mass) in the metal oxide product formed when Cu2CO3(OH)2 decomposes upon heating above 200°C?
What is the concentration of the solution as a mass percentage?
Helium gas at constant pressure of 7.4 atm, expands in volume from 21.3 L to 79.2 L. The temperature is held at 278 K. Calculate the work done by the gas (in joules).
Make a rough sketch showing how the following properties of a baseball depend on time, from the moment it is hit high into left field to the time it is caught by the outfielder. You may neglect the effects of friction!
Describe the predicted effect on glycine biosynthesis in a mutant mammalian cell if there is a mutation in the 5'-IRE sequence of ferritin mRNA that reduces the Ka of IRP binding as compared t binding with wild-type mRNA
Compare the experimental mole ratio of NaHCO3 to NaCl with the theoretical mole ratio. Explain the difference. The experimental mole ratio is 1:1.
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