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Stoichiometry

Q. (colliding cars) Car A is moving toward car B on a frozen lake. Car A's velocity is 7 m/s and its mass is half that of B's. They collide inelastically. Find the percentage of energy lost during the collision.

Solved • May 5, 2020

Stoichiometry

Q. (a)A 52.00-mL sample containing La3+ was treated with sodium oxalate to precipitate La2(C2O4)3, which was washed, dissolved in acid, and titrated with 18.48 mL of 0.006345 M KMnO4. Write the titration reaction. (Use the lowest possible whole number coefficients. Omit states-of-matter from your answer.) HINT: WebAssign expects a net ionic equation. However, in acidic solution oxalate is protonated and so exists as oxalic acid = H2C2O4. (b)Find [La3+ ] in the unknown.

Solved • May 3, 2020

Stoichiometry

Q. when hydrogen sulfide reacts with oxygen, water and sulfur dioxide are produced. The balanced equation for this reaction is 2H2S + 3O2 --> 2H2O + 2SO2. for all parts of this question, consider what will happen if 4 moles of hydrogen sulfide react. - how many moles of oxygen are consumed?

Solved • Apr 29, 2020

Stoichiometry

Q. When hydrogen sulfide reacts with oxygen, water and sulfur dioxide are produced. The balanced equation for this reaction is 2 H2S + 3 O2 → 2 H2O + 2 SO2. For all parts of this question, consider what will happen if 1.254 moles of hydrogen sulfide react. ▪ How many moles of oxygen are consumed?

Solved • Apr 29, 2020

Stoichiometry

Q. according to the following reaction, how many grams of sulfur are formed when 37.4g of water are formed? 2H2S(g)+SO2 (g) -> 3S(s) + 2H2O(l)

Solved • Apr 23, 2020

Stoichiometry

Q. Aluminum oxidizes according to the following equation: Al + O2 → Al2O3. 25.0 g of Al reacts with 30.0 g of O2. a. Balance the equation b. Which is the limiting reagent? c. How many grams of Al2O3 are produced? d. How much excess reagent remains?

Solved • Apr 21, 2020

Stoichiometry

Q. Solid zinc acetate is slowly added to 150 mL of a 0.0476 M sodium phosphate solution. The concentration of zinc ion required to just initiate precipitation is M.

Solved • Apr 21, 2020