Two substances A and B are combined to form a product C. The formation of the product is proportional to the time the reactants are combined. The final product is composed of three parts of A for every part of B. If initially A is 50 lbs and B is 60 lbs, and 10 lbs of the product are formed after 45 mins., find the time it takes for the reaction to form 25 lbs. What is the answer? Show the solution. A. 153 mins B. 135 mins

Suppose you are brewing beer, and you want to estimate how long it will take to complete the fermentation process. You place1.00 kgof sucrose(MM​=342.3 g/mol)and yeast in your fermentation vessel and add water to a final volume of3.50 L. You decide that your reaction will be considered completed when the concentration of sugar decreases to0.0100M. How long will it take (in minutes) from the start of the reaction to the completion of the reaction?

28.7 g sample of magnesium reacts with excess silver nitrate to produce silver metal and magnesium nitrate. The reaction is opped before all of the magnesium metal has reacted. A total of 85.4 g of solid metal is present. Calculate the mass of each metal in the 85.4 g mixture..

Gm= 8.50g. Cp= 3.30 g. Mm= 7.10g 2Gc+ 1Mm+4Cp=1Sm 2. a. Is there a relationship between the mass of one s’more and the masses of the reactants used to make it? What is the relationship? b. What law have you studied in this course that might define this relationship? c. Write out the three mass to unit conversion factors. (Note: one is given above)

A chemist adds 1.70 L of a 0.39 mol/L barium chloride (BaCl) solution to a reaction flask. Calculate the millimoles of barium chloride the chemist has added to the flask. Round your answer to 2 significant digits. manol O.P X

show the step-by-step process, and highlight the final answer. Observe the rules for significant figures when doing calculations.

* Question Completion Status: A Moving to another question will save this response. Question 26 SHOW WORK Given the following reaction: CaC 2(s) + 2H 20 - C2H 2(g) + Ca(OH) 2(aq) Assume that you place 1.85 g of calcium carbide in excess water and collect the acetylene gas over water. Calculate the maximum amount of gas that should be produced in grams round answer to 3 decimal places omit trailing zeroes The actual volume of acetylene and water vapor collected is 810 ml at 30.5°C with a pressure of 557.524 mmHg. Calculate the actual amount of gas collected(in grams) round answer to 3 decimal places omit trailing zeroes The vapor pressure of water at 30.5°C is 32.35 mmHg. Calculate the percent yield of acetylene. round answer to 2 decimal places omit trailing zeros A Moving to another question will save this response.

Remaining Time! 02:29:4. Consider the balanced chemical equations shown below. When a 6.00 g sample of a mixture of iron (Fe) and aluminum (Al) is treated with excess HCl(aq), 0.177 moles of H2 are obtained. What is the mass percentage of Fe in the original mixture? Choose the closest answer. Fe(s) + 2 HCI(aq) FeCl2(aq) - + H2(g) 2 Al(s) +6 HC((aq) 2 AICI3(aq) + 3 H2(g) 96 % 69 % 47 % 33 % 17 % Rack Question Menu - O O

A chemist makes 400. ml. of sodium carbonate (Na,CO,) working solution by adding distilled water to 160. ml. of a 1.39 M stock solution of sodium carbonate in water Calculate the concentration of the chemist's working solution, Round your answer to 3 significant digits. OM 0.8 A

10. A student reacted dilute nitric acid with lead(II) oxide to prepare lead(II) nitrate. The diagram shows the stages in the method used. 1 50 cm³ of dilute nitric acid was measured into a beaker DILUTE NITRIC ACID 3 The mixture was separated 2 Lead(II) oxide was added until all the nitric acid had reacted b. Why is the dilute nitric acid heated? heat a. Complete the boxes to identify the pieces of apparatus. 4 The solution was allowed to cool solution of -lead(II) nitrate