What is the main difference between sulfate minerals and sulfide minerals? (17 points) plz me : (a sulfates lack sulfur compounds, whereas sulfides contain sulfur compounds.b sulfates contain sulfur-oxygen compounds, whereas sulfides contain sulfur-metal compounds.c sulfates contain sulfur-carbon compounds, whereas sulfides contain sulfur-oxygen compounds.d sulfates contain sulfur compounds, whereas sulfides lack sulfur compounds.

The answer is; B

Sulfate is polyatomic and is given the empirical formula (S04 )2-. Sulfates are salts of sulfuric acid. Sulfides, on the other hand, given the empirical formulae (S)2- , is an inorganic anion that is as a result of chemical reaction with metals.

Answer:

Friction decreased when he went from pavement to ice and then increased two more times.

Explanation :

Friction is a force of resistance which is encountered when two objects come in contact.The force of friction increases whenever the surface is rough and decreases when the surface is smooth.When Joshua's car hit the ice, the force of friction decreases because the surface of ice is smooth but when he returns to pavement the friction increases and this increase is enhanced on the gravel road as it offers a very rough surface.

Thus, the frictional force during his trip first decreases due to ice and then increases two more times due to pavement and gravel road.