Calculate the mass of Zinc hydroxide (Zn(OH)2) that will dissolve in 500ml of pure water. The solubility constant for zinc hydroxide is 4.2*10^-17

How much charge is enclosed by the surface : If the electric flux through a closed surface is determined to be 2.10N?m2/C , how much charge is enclosed by the surface |

World development indicators database : Rresearch analyst in an environmentally-concerned consultancy group. Your team leader has given you a research task to investigate the empirical relationship between Australia's Gross Domestic Product |

Describe time-domain sequences for unity-amplitude : Recall that for discrete sequences the ts sample period (the time period between samples) is the reciprocal of the sample frequency fs. Write the equations, describing time-domain sequences for unity-amplitude cosine waves |

Explain the molar solubility of calcium oxalate : Calculate the molar solubility of calcium oxalate (CaC2O4) in a 0.080M calcium chloride solution. The Ksp of calcium oxalate is 2.3*10^-9 |

Explain calculate the mass of zinc hydroxide : Calculate the mass of Zinc hydroxide (Zn(OH)2) that will dissolve in 500ml of pure water. The solubility constant for zinc hydroxide is 4.2*10^-17 |

What is the maximum number of cycles of a 25 mhz : The A/D converter has internal memory that can store up to 4x106 discrete samples. What is the maximum number of cycles of a 25 MHz analog sinewave that can be stored in the A/D converter's memory. |

Explain the ka of 4-nitrophenol : A buffer is initially 0.180M in 4-nitrophenol (HC6H4NO3) and 0.200M in potassium 4-nitrophenolate (KC6H4NO3). The Ka of 4-nitrophenol is 3.8*10^-4 and the buffer has a pOH = 3.47. If 0.20g on NaOH were added to 100ml of this buffer what would the .. |

What current flows through resistor if resistance is given : the bottom of the conduction band at one end of a silicon resistor is at the same energy level as the top of the valence band at the other end. What current flows through the resistor if the resistance is 1.12k |

Calculate the magnitude of the centripetal force : A 9.30 kg monkey is hanging by one arm from a branch and swinging on a vertical circle. Calculate the magnitude of the centripetal force acting on the monkey |

## How many grams of potassium bromide are requiredhow many grams of potassium bromide are required to prepare 350 mL of a .200 M solution. |

## How many grams of precipitate are formedHow many grams of precipitate are formed when 204 mL of a 0.794 M aluminum sulfate soultion and 301 mL of a 1.48 M sodium hydroxide solution are mixed together? |

## What is the total number of electron domains for a moleculewhat is the total number of electron domains for a molecule having trigonal pyrmidal molecular geometry such as NH3 |

## How much heat is required to warm iceHow much heat is required to warm 227 g of ice from -44.5°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C. |

## What is the ph of the buffered solutionA buffer solution is prepared by adding 32.8 grams of sodium acetate, NaC2H3O2 to 1.00 L of 0.500 M acetic acid, CH3CO2H. Ka = 1.8 x 10-5 for acetic acid. |

## At what temperature does benzene boilBenzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1 degrees C. At what temperature does benzene boil when the external pressure is 490? |

## Describe what is the ph at the equivalence pointHCN is a weak acid dissolved in water. (Ka=6.2x10^-10). If a 50.0mL sample of 0.100 M HCL is titrated with 0.100 M NaOH 1) what is the pH at the equivalence point |

## Explain rnase is an enzyme that cleavesRNAse is an enzyme that cleaves the P-O5\' bond in RNA. It has two His residues in the active site. Suggest a plausible explanation |

## What is the percent yieldConsider the following reaction. N2 + 3H2 -> 2NH3 . 28.0 grams of N2 and 5.04 grams of H2 are reacted, producing 17.8 grams of NH3. What is the percent yield? |

## What is the molarity of the ethanol in this solutionA solution of ethanol (C2H5OH) in water is prepared by dissolving 56.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 255.0 mL of solution. What is the molarity of the ethanol in this solution? |

## State the monohydrate is found as the mineral kieseriteMagnesium sulfate can be obtained at a drugstore as Epsom salts. The monohydrate is found as the mineral kieserite (MgSO4 * H2O, 138 g/mol). |

## State mole fraction of all components in the mixtureWhat are the mass and mole fraction of all components in the mixture? What is the average molecular weight of the mixture? |

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