ASAP NICKEL

What are the common uses of this element? (LIST AT LEAST 10, BUT DESCRIBE 5 OF THOSE 10.)

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

A2.5% (by mass) solution concentration signifies that there is a 2.5 % (by mass) solution concentration signifies that there is blank of solute in every 100 g of solution. of solute in every 100 g of solution