Which of the following lists igneous rock in order from least to most ferromagnesian silicates?

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

Acetylene gas c2h2 undergoes combustion to produce carbon dioxide and water vapor how many grams of water are produced by the same amount of c2h2?