A truck uses 6 kg of fuel which undergoes complete combustion. The heat produced during the complete combustion was measured to be 220,000 kJ. Calculate the calorific value of the fuel.

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?

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen

Describe the interaction that occurs between two objects with the same electrical charge.