Plastic cup C

Mass of cup, water, and stirrer: 57.24g

Mass of sodium bicarbonate: 2.02g

Mass of citric acid: .76g

Total mass: 60.02g

Mass of cup, the solution, and stirrer after reaction: 59.53g

Difference: 0.49g

H₃C₆H₅O₇(aq) + 3NaHCO₃(aq) --->Na₃C₆H₅O₇(aq) + 3H₂O(l) + 3CO₂(g)

1)Determine which reactant is the limiting reactant in the plastic up C. Describe your reasoning

2) Calculate the theoretical yield of carbon dioxide in plastic cup C

3) Calculate the percentage yield in plastic cup C

You have a solution that is 0.25M Ca2+ and .18M Ag+. You begin to add CO32- (carbonate ion) to form CaCO3 , and Ag2CO3. Which will precipitate first? Second?

What is the concentration of the first ion at the point when the second begins to precipitate?

What percentage of the first ion has been removed?

There three questions here.

You determined the theoretical yield if 0.5 moles of zinc is used to form ZnI₂. Determine the percent yield if 515.6 g of product is recovered.

___ Zn + __I₂ → ___ZnI₂

A 10.45-m³ sample of gas (310K, 745mmHg pressure) was passed through a series of traps that removed teh water from the gas. The gas that came out was found to be at 780mmHg pressure and 273K. Its volume was 8.73-m³. What was the percentage of water vapor (v/v) in the original sample of gas? Assume ideal behavior for all gasous compounds.

A student is asked to standardize a solution of barium hydroxide. He weighs out 0.989 g potassium hydrogen phthalate (KHC8H4O4, treat this as a monoprotic acid). It requires 25.0 mL of barium hydroxide to reach the endpoint.

A. What is the molarity of the barium hydroxide solution?

This barium hydroxide solution is then used to titrate an unknown solution of hydroiodic acid.

B. If 18.0 mL of the barium hydroxide solution is required to neutralize 23.6 mL of hydroiodic acid, what is the molarity of the hydroiodic acid solution?

A voltaic cell consists of Cu²⁺/Cu and Cd²⁺/Cd half-cells. Each compartment has a volume of 0.500 L with the following initial concentrations: [Cu²⁺] = 1.250 M; [Cd²⁺] = 0.250 M at 25°C. What is the [Cu²⁺] when the voltage has dropped to 0.719 V? (E⁰ for Cu²⁺/Cu = 0.340 V and E⁰ for Cd²⁺/Cd = -0.400 V.)

Be sure to answer all parts. Calculate the volume in mL of a solution required to provide the following:

(a) 2.24 g of sodium chloride from a 0.415 M solution ___mL

(b) 5.40 g of ethanol from a 4.20 M solution ___mL

(c) 8.30 g of acetic acid (CH3COOH) from a 0.900 M solution ___mL

Based on the calculated values of Kc for each reaction stoichiometry, which reaction is the valid one?

Fe(aq)3+ + SCN(aq)- FeSCN(aq)2+ The average value of Kc: 369.10

Fe(aq)3+ +2 SCN(aq)- Fe(SCN)2(aq)+ The average value of Kc: 988999.02

Briefly explain your conclusion. Compare the percent difference between the average value and the individual measurements. What does this tell you about the two possible stoichiometries? Do these reactions give consistent values of Kcfor different initial reaction conditions?

how many grams of H2O can be produced when 45.5g of C3H8 reacts?

Which of the following statements best describes a metabolic pathway?

1.the set of molecular reactions in which enzymes make or break down sugars

2.chemical reactions that do not involve the use of enzymes and that maintain homeostasis

3.a chemical reaction that makes or breaks down molecules

4.a linked sequence of chemical reactions catalyzed by specific enzymes

A science teacher tells her class that their final project requires the students to measure a specific variable and determine the velocity of a car with no more than 2.5% error. Jennifer and Johnny work hard and decide the velocity of the car is 34.87 m/s. The teacher informs them that the actual velocity is 34.15 m/s. Will Jennifer and Johnny pass their final project? SHOW ALL YOUR WORK TO GET ANSWER.

Polypropylene has a degree of crystallinity that is dependent on its tacticity. Why?

A 1.000 g sample of copper reacts with an unknown element X to form 1.908 g Cu5X9. What is element X??