Follow your dreams, and know that even though you have lost, you have guardian angels watching over you, day in and day out”

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

An unknown substance has been shown to have metallic bonds. which of the following is most likely a property of this substance? a. low conductivity b. low boiling point c. high malleability d. high solubility in water