Calcular el tanto por ciento en masa de una disolución que tiene 25 ml de un soluto con una densidad de 0.8 g / cm3, y 500 ml de disolvente con una densidad de 1.1 g / cm3

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

Particles vibrate in a rigid structure and do not move relative to their neighbors.

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull