2Cu + O2 + 315kj - 2CuO. Is what kind of chemical reaction?

What is the difference between a closed system and open?

Why do valence electrons form bonds to create molecules and compounds? A. They are weaker than the electrons found closer to the nucleus. B. They are smaller than other electrons C. They are smaller than other electrons D.

Silver tarnishes as silver metal reacts with hydrogen sulfide, H2S, in the air. In this reaction, dark silver sulfide, Au2S, covers the surface of silver. When silver is polished, this coating of silver sulfide can be removed from the surface.

1pt Which form of energy can be found in an AA battery? O A. chemical B. radiant oc. nuclear D. electrical

When a mixture is stirred A) the rate of dissolving stops. B) the rate of dissolving will increase. C) the rate of dissolving will decrease. D) the rate of dissolving will remain constant.

plate a and plate b are both continental plates. what is ghe most likely result if the two plates collide?

According to the second law of thermodynamics, the entropy of any system always increases. According to the second law of thermodynamics, the entropy of any system always increases. True False

If the density of Cu is 8.96g/cm cubed, what is the volume of 28kg of Cu?

A piece of iron can change in different ways. How is iron bending different from iron rusting?

Which organism would least likely be selectively bred A) Dandelions B) Nantes Carrots C) Belgian Blue Cattle D) Hypoallergenic Cats