Calculate the quantity of electricity required to deposit 28.64g copper from it's salt solution [cu=64, F=96500 ] ​

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world