Aballoon filled with helium has a volume of 0.50 m3 at 21°c assuming the pressure and mass remain constant what volume will the balloon occupy at 0°c

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.