Calcium reacts with fluorine to form an ionic solid. The correct formula for this solid is

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

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)