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Decomposition of KClO3 is sometimes used to prepare small amounts of O2 in the laboratory: 2KClO3(s) 2 KCl(s) + 3 O2(g). How many grams of O2 can be prepared from 4.50 g of KClO3?
3-bromo- 1-butene and 1-bromo-2-butene undergo sN1 reaction at nearly the same rate even though one is a secondary halid and the other is primary why
When making up an unknown solution for absorption measurements, a good plain is to make up a solution that is rather on the concentrated side, measure its absorbance and compare it to the absorbance range of your standard curve. If it is higher th..
calculate the heat energy released when 15.1g of liquid mercury at 25 degrees C is converted to solid mercury at its melting point
A 45.3 g sample of Al at 95.5 oC is added to 182.7 g of water that is initially at 20.5 oC. The specific heat of Al and water are 0.90 J/(goC) and 4.184 J/(goC), respectively. Calculate the equilibrium temperature.
Determine the volume (in mL) of 5.16 M potassium hydroxide (KOH) that must be added to 44.7 mL of 0.703 M hypochlorous acid (HClO) to yield a pH of 7.82.
2 naclo3 -gt 2 nacl 3 o2determine the number of moles of o2 produced by the decomposition of 639 g of
For a large batch of nails, a manufacturer needs to plate a total zinc mass of 1.40kg on the surface to get adequate coverage. How many moles of zinc are in 1.40kg of zinc?
Calculate the molarity of a solution of 25.2mL of methanol combined with enough water to make 622mL of solution (density of methanol is 0.79180g/mL).
Describe the basic steps involved in a gravimetric analysis. How does this procedure help us determine the identity of a compound or the purity of a compound if its formula is unknown?
A buffer initially contains 0.10 mol acetic acid and 0.13 mol of sodium acetate in 1.00 L. 0.02 mol of potassium hydroxide is added to the buffer
According to the valence bond theory, which of the following molecules involves sp2 hybridization of orbitals on the central atom?
A 1g sample of carbon obtain from material found in a ancient site gave 7900 carbon-14 disentegrations in a 20-hour period. In the same amount of time 1g of carbon from a source found yesterday under went 18,400 disintegrations.
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