Que cambios son fisicos y cuales son quimicos?

a) quemar papel

b) limpiar objetos de plata

c) hacer hielo en el congelador

d) fundir hierro

What phrase describes the safety of water for use by humans, animals, and plants? A. Water Table B. Water Quality C. Watershed

What is an electron and proton?

The smallest part of a compound that still has properties of that compound is an?

Predict the shift in the equilibrium position that will occur for each of the following reactions when the volume of the reaction container is increased. a. 2 NH3 (g) ↔ N2 (g) + 3 H2 (g) b. PCl5 (g) ↔ PCl3 (g) + Cl2 (g) c.

What is the balanced form fir Na (s) + ao2 (g) = Na2O (s)

The balanced equation for the generation of sugar from sunlight water and co2 is

Isotopes of the same element have different ... A. Positions on the periodic table b. atomic numbers C. Mass number

How many moles of O2 are needed to make 1.98 moles of SO3

How many protons are in the nucleus of isotopes L?

What is the empirical formula for a compound that contains 38.77% Cl and 61.23% O?