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1)Nickel oxide crystallizes in the NaCl type of cystal structure. The length of an edge of the unit cell of NiO is 4.18A. What is the NiO bond length? Assuming the anions touch along the face diagonal, what is the radious of an O2- anion? what is the approximate radius of the Ni2+ ion? ...
2) A certain dorm of silver iodide adopts the zinc blende structure. The density of the salt is 5.69 g/cm3. Calculate the length of a side of the unit cell. Calculate an approximate distance between the silver cations and iodide anions in the structure.
NaOH + CO2 -> Na2CO3 + H2O. If the average human body discharges 745 g of CO2 per day, how much NaOH is needed each day for each person in the spacecraft.
What is the value of x in the formula for the hydrate? (hint: remember that x represents the ratio of moles of H2O to moles of hydrate compound, and that moles of hydrate compound equals the moles of anhydrous compound)
Hydrogen and iodine gases react to form hydrogen iodide gas. H2(g) + I2(g) → 2 HI(g) At a certain temperature and pressure 0.70 L of H2 reacts with 0.70 L of I2.
A certain gas has a volume of 200 dm3 at 27oC and 2 atmospheres of pressure. What is its volume at STP?
basketball with a volume of 3.50 Liters is left in a car when the temperature is 298 K. What will the volume of the ball be as the car heats up to 305 K during the day?
The specific heats of ice and water are 2.09 and 4.184 J/g.°C, respectively. The heat of fusion for water is 334 J/g.
The buret is misaligned with the drop counter so approximately 10 drops of NaOH are added to the HCl before they are counted
Exactly 100 pounds of cane sugar (dextrose), C12H22O11, were accidentally discharged into a small stream saturated with oxygen from the air at 25 celcius.
Endorphins: What Are They and How Do They Work?, Describe in brief the chemistry and biology of the feel-good chemical, endorphins. Also explain why the name feel good
Why exactly are oxidation reactions one in which a oxygen is inserted into a bond, hydrogen is removed from a bond, and a more electronegative atom is inserted in the bond, replacing a carbon or a hydrogen
Compute the pH of a solution made by mixing 67 grams of sodium acetate, NaCH 3 COO, to 37 g of acetic acid, CH 3 COOH, and dissolving in H 2 O to form 300. mL of solution ?
A 2.50 g sample of white solid was vaporized in a 345 mL vessel. If the vapor has a pressure of 985 mmHg at 180°C, what is the molecular weight of the solid.
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