What is the energy change if an ice cube of mass 50 grams (initially at it's normal melting point) was converted to steam at the normal boiling point or water?

Which is mostly likely why many scientists reject the cold fusion theory

Which is a characteristic of mixtures?

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?