Explain how scientific knowledge is developed when people make observations about the natural world. How can scientists ensure that their data are reliable?

Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each stage.

What does x represent in the formula for the compound xcl4?

When 225mg of anthracene, c14h10(s), was burned in a bomb calorimeter the temperature rose by 1.75k. calculate the calorimeter constant. by how much will the temperature rise when 125mg of phenol, c6h5oh(s), is burned in the calorimeter under the same conditions? (δch< (c14h10,s)=–7061 kj mol−1.)