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If a 10.0 g sample of Zn(s) is treated with excess HCl, what volume of hydrogen gas is evolved at STP?Zn (s) + 2 HCl (aq) -> ZnCl2 (aq) + H2 (g)
the ligand hydrotris 1-pyrazolylborate is commonly used in biomimetic complexes. draw out the ligand. why is this a
A current of 0.0100 A is passed through a solution of rhodium sulfate, causing reduction of the metal ion to the metal. After 3.00 h, 0.038 g of Rh has been deposited. What is the charge on the rhodium ion, Rhn+? What is the formula for rhodium su..
What is the Volume of 0.75 mol of Benzene (C6H6) at 20.7 degrees C. The density of Benzene is 0.879 g/mL
The inventor proposed the revolutionary design of the new engine based on the heat stored in the ocean. The inventor plan is to mount it on a boat in San Francisco and set off on a journey across the Pacific Ocean.
given that the molar enthalpy of vaporization delta h for H2O(l) is 44kj at 298k, what is the standerd enthalpy change for the reaction 2H20(G)+ O2(g)---->2H2O(G)?
Write a balanced equation for the combustion of heptane, C7H16, in oxygen, , forming the products carbon dioxide, and water, H2O. How many grams of water will be produced by the complete reaction of 7.88 grams of heptane?
State whether the sign of the entropy change of the following processes will be positive or negative. a. PCl3 (l) + Cl2 (g) -> PCl5 (s)
What is the hydronium ion concentration of a 0.500 M acetic acid solution with Ka = 1.8 x 10-5. The equation for the dissociation of acetic acid is: CH3CO2H(aq) + H2O(l) H3O+(aq) + CH3CO2-(aq)
what mass of sucrose should be combined with 478 of water to make a solution with an osmotic pressure of 8.60 at 320 ?
The total mass of solid unknown dissolved in the sample was 0.1200 g. If the sample were dissolved to a final volume of 100.0 mL, and a 25.00 mL sample of the solution required 36.32 mL of EDTA solution, find the mass percent of CaCO3 that was pre..
The ratio of oxygen (Oxygen-16 and Oxygen-18) isotopes is measured and used to determine the approximate temperature during the time that part of the ice core was formed. This method is one example of a proxy. In a few sentences, explain what a pr..
When sodium carbonate reacts with hydrochloric acid, the carbonic acid that is formed immediately breaks down into carbon dioxide and water. What weight of sodium carbonate would have been present originally
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