In terms of ion charges and chemical change, what is the difference between CuF (s) and CuF 2(s) ?

Ibeg i need 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?

If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? the density of ethanol is 0.80g/ml

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2