Monday
September 1, 2014

Posts by tweety


Total # Posts: 20

Physics
What happens to your tongue when you lick an aluminum ice cream scrapper just after it has been used? Does it stick to the scraper? Why?
December 1, 2013

Physics
Why do some cooks put long aluminum nails through potatoes to be baked?
December 1, 2013

Physics
Why do some cooks put ice in the pot to cook meat? Explain then prove your answer by solution?
December 1, 2013

Physics
Thanks a lot . God bless !:)
December 1, 2013

Physics
A coin and a piece of glass are both heated to 60°C. Which will feel warmer when you touch it?
December 1, 2013

Physics
Where does it takes less time to boils eggs: in a pan of boiling water or in a pressure cooker?
December 1, 2013

Physics
I want a clear answer please?
December 1, 2013

Civics and Economics
what was the problem and solution in the Electoral College Compromise?
September 14, 2010

grammer
IT RAINED EVERYDAY ON OUR VACATION NEVERTHELESS; WE HAD A GREAT TIME
March 25, 2010

organic chemistry
How would using sodium fluoroacetate instead of sodium chloroacetate affect the reaction? This experiment was to synthesis of plant hormone. and If sodium iodoacetate is used instead of sodium chloroacetate, how will the rate of reaction be affected? Explain.
January 24, 2010

chemistry
If the molecular mass for a chemical is 64.10 g/mol and the enthalpy of formation is -63 kJ/mol, the heat change will be _____kJ when 10.0 g of this chemical is formed.
February 23, 2009

chemistry lab
When 0.969 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 397C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do not round...
February 23, 2009

chemistry lab
please help its due at 5 When 0.671 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 109C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to ...
February 23, 2009

chemistry
The element Xe has ccp packing with a face-centered cubic unit cell. The density of xenon is 3.783 g/mL and the cell volume is 2.306 x 10-22 mL. Calculate the value of Avogadro's number to three significant figures based on these data.
February 21, 2009

chemistry
The element Rb has bcc packing with a body-centered cubic unit cell. The density of Rb is 1.532 g/cm3 and the cell volume is 1.852 x 10-22 mL. Calculate the value of Avogadro's number to three significant figures based on these data.
February 21, 2009

chemistry
The element K has bcc packing with a body-centered cubic unit cell. The density of K is 0.862 g/mL. Calculate the volume (L) of the unit cell of K.
February 21, 2009

chemistry
The element platinum has ccp packing with a face-centered cubic unit cell. The density of platinum is 21.5 g/cm3. Calculate the volume (cm3) of the unit cell of platinum.
February 21, 2009

chemistry
The density of platinum is 21500 kg/m3 and the cell volume is 6.04 x 10-26 L. Determine the number of atoms in the unit cell. Note: the number of atoms in a unit cell is a whole number.
February 21, 2009

chemistry
The element lithium has bcc packing with a body-centered cubic unit cell. The volume of the unit cell is 4.32 x 10-26 L. Calculate the density (g/cm3) of the element.
February 21, 2009

chemistry
When 0.969 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 397C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do not round...
February 21, 2009

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