April 27, 2015

Homework Help: Chemistry

Posted by W I C K E D on Wednesday, September 24, 2008 at 9:12pm.

OMG, I did the other fifteen questions of my homework but I'm stuck on these.

#1: Which has the higher average kinetic energy, a tub full of 50'C water, or a small cup of 52'C water. Why?

Which has more total kinetic energy, the tub or the cup? Why?

#2: Lithium, sodium, and potassium all react violently with water. Knowing this, and looking at the periodic table, would you expect cesium to react violently with water as well? Explain why or why not?

#3: What is a periodic trend?

Using the concept of periodic trend, which is larger in size: an atom of cesium (Cs) or an atom of astatine (At)?

#4: You hold a potato chip motionless in your hand above the ground.

What kind of energy does the potato chip have based on its position?

You drop the potato chip. What kind of energy does it have as it falls?

How would you release the chemical potential energy inside the potato chip?

The potato chip has 10,000 calories of chemical potential energy. How many joules does it have?

#5: You have an irregularly shaped rock. How can you find its volume?

You discover that the volume of the material is 150 mL. Its mass is is 1701g. What is its density?

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