Stephanie está haciendo una investigación
con cobre y amoniaco. Ella sumerge el
cobre en una solución de amoniaco. El
cobre cambia a un color azul oscuro.
Stephanie piensa que el cobre se oxida.

¿Qué tipo de cambio ocurre en el cobre
que usa Stephanie?

Acambio físico

B cambio químico

C cambio de estado

D cambio de viscosidad

B Chemical change

Explanation:

Something formed with a dark blue colour. It was a new substance with new properties, so this was a chemical change.

A is wrong because a new substance formed.

C is wrong because the copper stayed solid.

D is wrong because they did not say anything about the viscosity of the solution .

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d

watch you tube or play clash royale, mainly clash royale