Which is a chemical change, water boiling, wood burning, glass breaking, ice melting, or molding iron?

The burning of coal, a fossil fuel, produces water and carbon dioxide. How is this similar to cellular respiration? A) Both require high temperatures. B) Heat energy is lost in both cases. Eliminate C) Both involve the breakdown of carbon compounds.

When sedimentary rock is exposed to heat and pressure what dose it change to

During an investigation a scientist heated 2.76 g of silver carbonate till it decomposed to leave a silver residue. The total mass of the silver residue formed was 2.16 g.

A mathematical equation is an example of: A scientific theory A scientific law A model More than one of these

Calculate the volume of 2.5*10-4 moles of h2

A) If you weigh a hydrated compound before and after heating it. Do you expect the mass to be more or less than before heating? Explain why. b) How about if you weigh a bag of popcorn before and after heating it.

Define the term relative molecular mass

It took many of the metals several minutes to begin to react. Once the reaction was initiated, several of these metals continued to react quite vigorously.

What dose the smooth ER do

How many valence electrons are in each atom?