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Molecular masses can be determined through electroplating. Determine the molecular mass and identity of a +2 metal, X, that plates 46.3g of X in 6.75 hours at a current of 2 A.
Dissolving NH4NO3 in water is an endothermic process. In fact, this reaction is often used in cold packs sold at the drug store. When 23.8 g of NH4NO3 was rapidly dissolved in 79.5 mL of water in a coffee cup calorimeter,
Problem- A sample of crude oil contains 3.09 mM naphthalene, 13.0 mM methylnaphthalene, 23.3 mM dimethylnaphthalene, and 14.2 mM trimethylnaphthalene. What is the total number of moles of all naphthalene compounds combined in a 100.0 mL of oil
A 250.0 mL sample of chlorine gas is collected when the barometric pressure is 798 mmHg. What is the volume of the sample after the barometric pressure dropped to 745 mmHg?
The coal that is burned is a form of pure carbon. (Diamonds and graphite are other forms of pure carbon). A sample of coal is completely burned in a 10.0 L cylinder at a constant pressure of 1.10 atm and a temperature of 1000 oC.
The density of helium is .01784g/l at S.T.P. I a given mass of helium at S.T.P is allowed to expand to 1.500 times its inital volume bu changing the temperature and pressure,
Problem- Consider the titration of 25mL of 0.1M I- with 0.05M Ag+, where we monitor the Ag+ concentration with an electrode. Determine the pAg after the addition of 10mL of titrant, at the equivalence point, and after the addition of 52mL of titra..
The stilbene molecule has seven double bonds, yet in this reaction, only one of them undergoes addition with the Br2 generated in the reaction mixture. What functional group(s) is(are) the other six bonds in, and what can you say about the reactiv..
in niobium nb metal the valence orbitals are the 5s 4d and 5p orbitals. if the bonding in nb metal is described used
How might your description of the flame color for NaCl change if your wire containing the salt slurry was contaminated with CuCl2
Consider the reaction: CO(g)+Cl2(g)===COCl2(g) Keq= 2.9×10^10 at 25 degress celsius A 5.89 -L flask containing an equilibrium reaction mixture has [CO]= 1.4×10^?6M and = 6.3×10^?7M How much COCl2 in grams is in the equilibrium mixture
Zinc sulfide reacts with nitric acid to give zinc sulfate and nitric oxide. Calculate the mass of zinc required to react with 110 mL of 0.15 M nitric acid.
A an aqueous methanol (CH3OH) solution has a mole fraction of 0.430 of methanol. What mass of water would be present in 706 g of this solution?
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