A saturated solution of Na2SO4, with excess of the solid, is present at equilibrium with its vapour in a closed vessel.

(a) How many phases and components are present.

(b) What is the variance (the number of degrees of freedom) of the system? Identify the independent variables.

Short term frame impact on long term frame : The SEC regulations require u.s. corporations to publish operating results on a quarterly basis. How does this short term time frame impact long term profit maximization? |

Would the company encounter any problems in decision making : Assume you are hired as a consultant by Barks Industries, a company in a monopolistically competitive industry. How would you advise the company in terms of pricing, output, resource usage, and advertising? |

State what is the concentration of ammonia : unknown concentration of the weak base ammonia are standardized. 50.0 mL of the basic solution are titrated with 0.200 M HCl. The end point occurs after 38.8 mL of acid are added. What is the concentration of ammonia in the 2 L flask? |

Find the equation of the new demand curve : Starting with the estimated demand function for Chevrolets given in Problem 2, assume that the average value of the independent variables changes to N=225 million, I =$12,000, P= $10,000 P= 100 cents, A=$250,000 and P=O |

Explain how many phases and components are present : How many phases and components are present. (b) What is the variance (the number of degrees of freedom) of the system? Identify the independent variables. |

When to raise or lower the price : Since demand elasticity is greater than 1 (absolute value) revenues will be increased, and since price is above marginal costs profits will increase. |

Compute the standard gibbs energy and the equilibrium : Calculate the standard Gibbs energy and the equilibrium constant at 298 K and 400 K for the reaction, PbO(s) + CO(g) = Pb(s) + CO2(g). |

State what is the minimum pressure that must be applied : A reverse osmosis unit is used to obtain drinkable water from a source that contains 0.740 g NaCl per liter. What is the minimum pressure (in torr) that must be applied across the semipermeable membrane |

What is the profit-maximizing price : Suppose you have 10 indivduals with vales ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10. . our marginal cost of production is $2.50. What is the profit-maximizing price? |

## What volume will the gas occupy at 288ka gas sample has a volume of .150 L at a temperature of 256 K. What volume will the gas occupy at 288K? |

## Describe why magnetic metals are foundExplain why magnetic metals are found only among the 3d and 4f elements. Why are Sc and Ti, which are also 3d elements, diamagnetic? |

## Determine how many grams of salt will be producedCalcium carbonate reacts with hydrochloric acid to forma a salt, carbon dioxide and water. Write the balanced equation and determine how many grams of salt will be produced of 50g of calcium carbonate was used? |

## How many times faster will the reaction occurHow many times faster will the reaction occur at 43^circ {rm C} than at 0 ^circ {rm C}? How many times faster will the reaction occur at 43^circ {rm C} than at 0 ^circ {rm C}? |

## Compute kc for the reactioncalculate Kc for the reaction below: 2P(g)+ 5Cl2(g) 2PCl5(g) The answer provided is 240. Why is that? |

## What is the mass of the steel barA volume of 95.0ml of h2o is initially at room temperature 22.0 C. A chilled steel rod at 2.00 *C.is placed in the water. If the final temperature of the system is 21.2 *C. what is the mass of the steel bar? |

## What was the final temperature of the goldA 4.90 g nugget of pure gold absorbed 266 J of heat. What was the final temperature of the gold if the initial temperature was 23.0°C? The specific heat of gold is 0.129 J/(g·°C). |

## How many mol of co2 are producedhow many mol of CO2 are produced for every mol of pentene reacted. The chemical reaction is pentene + oxygen = carbon dioxide + water. |

## Coolant in a refrigerator coilIdentify the following systems as open, closed, or isolated. i) Coolant in a refrigerator coil ii) The combustion of liquid hexane in a bomb calorimeter |

## What is the osmotic pressure of the resulting solutionA compound is found to have a molar mass of 598 g/mol. If 35.8 mg of the compound is dissolved in enough water to make 175 mL of solution at 25°C, what is the osmotic pressure of the resulting solution? |

## How many moles of na+ are in 1.00l of the saline solutionA physiological saline solution contains 154 mEq/L each of Na+ and Cl-. How many moles of Na+ are in 1.00L of the saline solution? |

## What is the mass percent of a sodium fluoride solutionWhat is the mass percent of a sodium fluoride solution prepared by dissolving 0.64 moles of sodium fluoride into 63.5 grams of water? |

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