Sr(OH)2, is considerably more soluble in hot than in cold water. At 25 °C, 1.01 g of this compound dissolves in 0.100 L of water, but 27.9 g dissolves at 100.0 °C. Calculate Ksp at the temperature of 25°C

What are the magnitude and sign of the unknown charge : A 20-mC charge is 4 cm above an unknown charge q. The electric intensity at a point 1 cm above the 20-mC charge is 2.20x109 N/C and is directed upward. What are the magnitude and sign of the unknown charge? |

Explain the equilibrium concentration of the red iron : If the reaction between iron (III) ion and thiocyanate ion yielded an equilibrium concentration of .15 M for each of these ions, what is the equilibrium concentration of the red iron (III)-thiocyanate complex |

Evaluate by how much is the column compressed : A 3.4-m-tall, 90-cm-diameter concrete column supports a 4.0×10^5kg load. By how much is the column compressed |

Find the frequency of this reflected wave : A firefighter on the back of the fire engine hears the sound waves after they are reflected from the wall. What is the frequency of this reflected wave as heard by this firefighter |

Evaluate ksp at the temperature of 25°c : Sr(OH)2, is considerably more soluble in hot than in cold water. At 25 °C, 1.01 g of this compound dissolves in 0.100 L of water, but 27.9 g dissolves at 100.0 °C. Calculate Ksp at the temperature of 25°C |

Determine what is the kinetic energy of the ball : An outfielder throws a 0.150 kg baseball at a speed of 42.0 m/s and an initial angle of 30.0°. What is the kinetic energy of the ball |

What is the average emf produced across the soil : A loop of 25 turns of wire and radius 15 cm is placed perpendicular to a magnetic field of .4T. what is the average EMF produced across the soil |

Explain the reaction to be faster at the higher temperature : If you did reaction of zinc with 6 M HCl at 20C and at 50C. should you expect the reaction to be faster at the higher temperature. how much faster |

Find what is the radius of the path traveled : A proton (m = 1.672 X 10^-27kg, q= 1.6 X 10^-19 c) is accelerated through an electric potential of 95 volts and enters a region perpendicular to a magnetic field of .62T |

## What is the enthalpy of neutralization50.0 ml of 0.987 M HCl was mixed with 50.0 ml of 1.02 M NaOH, the heat of neutralization was calculated to be -2.7 kJ. What is the enthalpy (molar heat) of neutralization? |

## Explain what is the value of the equilibrium constantProceeds at a certain temperature until the partial pressures of H2O, H2, and O2 reach 0.065 atm, 0.0070 atm, and 0.0040 atm respectively. What is the value of the equilibrium constant at this temperature |

## Calculate the approximate volume of a sample of gascalculate the approximate volume of a 0.600 mol sample of gas at 15.0 degrees Celcius and a pressure of 1.10 atm. |

## Calculate the molarity of the glucose solutionIf 2.50 g of glucose (C6H12O6) are dissolved in 1.00 x 102 mL of solution, calculate the molarity of the glucose solution. |

## State the turbine bearings may be assumed neglibleA steam turbine receives a flow of 10,000 lb of steam per hour and delivers 500 kW in that period. Heat losses from the casing and the turbine bearings may be assumed neglible |

## Evaluate the conductivity of the materialA semiconductor of n-type is know to have an electron concentration of 3 x 10^18 m ^3 if the electron drift velocity is 100 m/s in an electric field of 500 V/m, calculate the conductivity of this material. |

## Depict the skeletal structure for major organic productDraw the skeletal structure for major organic product produced when the arene given reacts with 2 equivalents each of Na and HOCH3 |

## A gas sample was collected over water at 253oc the totala gas sample was collected over water at 25.3oc. the total pressure is determined to be 0.97 atm. what is the partial |

## Explain the sample at constant temperature and pressureWhich of the following would produce the greatest increase in the volume of a gas sample: a. doubling the amount of gas in the sample at constant temperature and pressure, or b. raising the temperature from 244 degrees C to 1100 degrees C. |

## Compute the percent relative error for the three solutionsCalculate the percent relative error for the three solutions if perfect technique is used. Report the two new molarities. (The error in a 10-mL transfer pipet is 0.02, and the error in the 200-mL volumetric flask is 0.1) |

## Explain at what volume of added acid is the calculatedAt what volume of added acid is the calculated by working an equilibrium problem based on the initial concentration and of the weak base |

## What is the molarity of a solutionWhat is the molarity of a solution prepared by dissolving 13.1 g of glucose (of MW 180 amu) in 217 mL of solution? |

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