Consider the following equation. 2 H2 (g) + O2 (g) –> 2 H2O (g) If 3.0 moles of H2 (g) react fully with oxygen how many moles of water will be made?
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A 25.0 mL sample of HBr is neutralized by reaction with 20.0…
A 25.0 mL sample of HBr is neutralized by reaction with 20.0 mL of 3.00 M KOH. What is the concentration of HBr is the unknown sample? *hint- find the concentration of the base first.
. Based on electronegativities, a P-Cl bond is:
. Based on electronegativities, a P-Cl bond is:
A sample of metal has a mass of [m] grams. What is this mas…
A sample of metal has a mass of [m] grams. What is this mass in milligrams?
A solution has a mass of [x] grams, and a volume of [y] mL. …
A solution has a mass of [x] grams, and a volume of [y] mL. What is the density (g/mL) of this solution, reported to the correct number of significant digits?
An aqueous solution is found to have an H+ concentration of…
An aqueous solution is found to have an H+ concentration of 7.8 x 10-2 M. What is the concentration of OH- in this solution?
The following reaction is an example of an ___ reaction. 2 N…
The following reaction is an example of an ___ reaction. 2 N2(g) + O2(g) → 2 N2O (g) ΔHrxn = +163.2 kJ
What is the frequency of a photon of light with a wavelength…
What is the frequency of a photon of light with a wavelength of 615 nm?
Using VSEPR , fill in the table. Attach an image of your wor…
Using VSEPR , fill in the table. Attach an image of your work- must be handwritten. Lewis Dot Structure # bonded groups #lone pairs Molecular Shape CH4 CCl2O
A chemist carries out this reaction in the laboratory, using…
A chemist carries out this reaction in the laboratory, using [x] grams of zinc and an excess of sulfur: She isolated [y] g of ZnS. Zn + S –> ZnS Using the balanced equation, calculate the percent yield the chemist retrieved from the reaction. What is her percent yield for this reaction? percent yield= (actual yield)/(theo yield) *100%