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A piece of zinc metal reacts in HCL(aq) to produce zinc chloride and hydrogen gas accoridng to the equation : Zn(s) +2 HCl (aq) = ZnCl2 (aq) + H2 (g). The hydrogen gas generated is collected over water at 20.0 C. The volume of the gas is 246 mL at 760 mm Hg. What mass of zinc was used? ( Vapor pressure of water at 20.0 C =17.54 mm HG)
The next day you notice that some of the gas has leaked out. The pressure and temperature remain the same, but the volume has changed to 12.0 . How many moles of gas () remain in the cylinder
When 280. mL of 1.50× 10-4 M hydrochloric acid is added to 125 mL of 1.75 × 10-4 M Mg(OH)2, the resulting solution will be
Calculate ΔH° for the reaction -> 2 K(s) + 2 H2O(l) 2 KOH(aq) + H2(g) A 4.85-g chunk of potassium is dropped into 1.06 kg water at 24.0°C.
Hydrogen atoms that are bonded to an sp3 hybridized carbon atom normally appear between 0.9 & 1.8 ppm and are said to be shielded
A 2.45-g sample of strontium completely reacts with oxygen to form 2.89 g of strontium oxide. Use this data to calculate the mass percent composition of strontium in strontium oxide.
How would the addition of sodium chloride affect the hydrated cobalt(II) ion equilibrium? Explain using Le Chatelier's principle
A compound containing only C, H, and O, was extracted from the bark of the sassafras tree. the combustion of 88.5 mg produced 241 mg of CO2 and 49.2 mg of H2O. the molar mass of the compound was 162 g/mol.
What would the solubility of copper (II) tartrate be in a solution that contains 0.12 M sodium tartrate?
Formic acid, HFor, has a Ka value equal to about 1.8x10-4. A student is asked to prepare a buffer having a pH of 3.40 from a .10M HFor and a .10M NaFor solution. How many milliliters of the NaFor solution should she add to 20mL of the .10M HFor to..
What are the pH values if you take into account that the 8.00 mL of 0.10 M Acid was first diluted with 100 mL of water
Empirical and Molecular Formula of Adrenaline, Adrenaline contains 59% C, 7.1% H, 26.2% O and 7.7% N and has a molar mass of about 180 g/mol.
what is the minimum amount of NaCl needed to get the 18.2 degrees? Its a molality equation
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