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1) When 5.00g of copper reacts with oxygen, the copper oxide product has a mass of 5.62g. What is the empirical formula of this copper oxide? MM Cu= 63.5, O= 16.0
2) What is the molarity of acetic acid, CH3COOH (MM= 60.0) in vinegar if a 5.00mL sample of vinegar requires 22.50mL of a 0.195M NaOH solution to neutralize it?
3) A 20.00mL sample of NaCl solution has a mass of 20.75g. After the NaCl solution is evaporated to dryness the dry salt has a mass of 4.35g. Calculate the following concentration for the NaCl solution, MM NaCl= 58.5
(a) % m/m (or % w/w)
(b) % m/v
(c) Molarity (M)
if 8.40 grams of C are burned, how much heat will be released for the following balanced reaction: C + O2 -> CO2 + heat (393 KJ)
When a charge transfer electrode reaction occurs at a very slow rate, the concnetration on the surface of the electrode is ____ than the bulk concentration.
55.0 calories of heat are added to a small lead block. If the temperature of the lead increases from 27.0°C to 59.2°C, what must be the mass of the lead block?
Calculate the fraction of methyl isonitrile molecules that have an energy of 160.0 kJ or greater at 510k and 514 k. What is the ratio of the fraction at 514 k to that at 510 k.
If you are given sodium acetate and asked to make a .5 M acetate buffer at pH 4.75, will you have to add acid, base, or nothing in order to achieve the proper pH? What is the approximate pH after adding the sodium acetate?
Compounds containing carbon-carbon triple bond undergo the Diels-Alder reaction. Formulate the product formed by the reaction
A piece of sodium metal reacts completely with water as follows. 2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g) The hydrogen gas generated is collected over water
Calculate the pH at the equivalence point for the titration of 0.230 M methylamine (CH3NH2) with 0.230 M HCl. The Kb of methylamine is 5.0× 10-4.
Calculate the molarity of each of the following solutions 20.0 g NaCl in 1.0 L H2O
how many moles can be produced from 2.5 moles of Ag2CO3 and final temperature of the calorimeter contents is 23.83°C After dissolution of the salt.
ICE Problem: Calculate Final Concentrations, Phosgene, COCl2 (g), is an extremely toxic gas. It was used during World War I. Today it is used to manufacture pesticides, pharmaceuticals, dyes, and polymers. It is prepared by mixing carbon monoxide ..
The temperature of 55.6 g of a material decreases by 14.8C when it loses 3080 J of heat. What is its specific heat?
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