What is an example of an irreversible physical change?

melting an ice cube

making sawdust

crumpling paper

boiling water

The atomic number of magnesium (mg) is 12. this is also the number of which of the following

did the data support Martha's hypothesis? Use evidence to explain why or why not. if you feel the data were inconclusive, explain why.

12) Which of the above solutions could be used to remove lead from lead (II) nitrate? a. Cu b. Hg c. Ag d. Ni

Which 2 + ion has two 3d electrons? which has eight 3d electrons?

In water conservation, chemists spread a thin film of a certain inert material over the surface of water to cut down on the rate of evaporation of water in reservoirs, This technique was pioneered by Benjamin Franklin three centuries ago.

Acid indigestion is sometimes neutralized with an antacid such as magnesium hydroxide (Mg (OH) 2). What products will be released when the antacid is mixed with the hydrochloric acid in the stomach

What particles make up the nucleus

Calculate the wavelength of EMR that has a frequency of 9.50 x 10^8 Hz

How many moles of FeO are produced if 8 moles of CuFeS, are consumed?

Which chemical found in tobacco is a stimulant drug