Is cutting a sheet of paper in half a physical or chemical change

When ammonium nitrate (nh4no3) explodes, the products are nitrogen, oxygen and water. when 40 grams of ammonium nitrate explode, 14 grams of nitrogen and 8 grams of oxygen form. how many grams of water form?

A group of maple tree is an example of a

What is biological difference

What do all of the elements in a given horizontal row of the periodic table have in common?

What atom has the largest atomic radius

An excess of NiCO3, 12 g, was added to 40cm cube of sulpheric acid, 2.0 mol/dm cube. The unreacted nickel carbonate was filtered out and the filtrate evaporated to optain the crystals.

Under what condition is decompostion the fastest? Under what condition is it the slowest?

Which compound has the strongest hydrogen bonding between its molecules? 1. HBr 2. HF 3. HCl 4. HI

Arrange the following bonds in order of increasing polarity: O-H, C-H, F-H, H-H A) O-H B) C-H<0-H C) H-H D) C-H E) HH

How fast do p waves travel?