2. Coal is a fossil fuel. When heated strongly, sulfur dioxide gas is one of the products
formed,
Sulfur dioxide changes the colour of acidified potassium manganate(VII) from
purple to colourless.
Plan an investigation to show which of the two different types of coal produces the
most sulfur dioxide when heated. You are provided with one lump of each type of
coal.

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.      

the correct answer would be b) volume versus temperature, because they are also directly proportional.

window cleaner is ammonia dissolved in water. this is an example of a