Sunday
April 20, 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?

Physics
Why do some cooks put long aluminum nails through potatoes to be baked?

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

Physics
Thanks a lot . God bless !:)

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

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

Physics
I want a clear answer please?

Civics and Economics
what was the problem and solution in the Electoral College Compromise?

grammer
IT RAINED EVERYDAY ON OUR VACATION NEVERTHELESS; WE HAD A GREAT TIME

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.

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.

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...

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 sig...

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.

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.

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.

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.

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.

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.

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...

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