Determine the mechanical energy of this object: a 1-kg ball sits on a 10-meter high cliff.

a. 98 J

b. 10 J

c. 980 J

d. The ball isn't moving, so the mechanical energy is zero.

What would you see when an iron rod is placed into a solution containing aqueous copper (ll) ions

Find the volume of 0.100 M hydrochloric acid necessary to react completely with 1.51 g Al (OH) 3.

Which statement most accurately compares the temperature of the core of the sun to its surface? A) the core is more than a thousand times hotter than the surface B) the surface is more than a thousand times hotter than the core C) the core is more

What is the molality of aqueous nitric acid HNO3 (63 g/mol) that has a density of 1.42 g/mL and is 16.7 M? Report your answer to three significant figures. Do not include units.

Which is not a compound? sugar water silicon dioxide gold

Calculate the mass percent composition of sulfur in Al2 (SO4) 3. Calculate the mass percent composition of sulfur in Al2 (SO4) 3. 28.12 % 42.73 % 35.97 % 9.372 % 21.38 %

What is a striking a match an example of

In any ordinary chemical reaction, matter is neither created nor destroyed; it is simply changed from one chemical substance to another. This principle is called the Law of:

Which of the following shows no reaction with acid? A. copper B. copper carbonate C. magnesium carbonate D. magnesium

Describe what happens to salt when it dissolves in water.