Can someone check if my answers are correct for these 5 questions? Thanks in advance
1) How many moles are there in each of the following?
a) 72 g of Mg
.......Moles=72g/24=3g...…
b) 4 kg of CuO
…………………Moles=4000g/80=50g…………………………………………………………………………
c) 39 g of Al(OH)3
………………………Moles=39g/78=0.5g……………………………………………………………………
d) 1 tonne of NaCl
………………1 tonne= 1000000g so Moles=1000000/78=12820g……………………………………………………………………………
e) 20 mg of Cu(NO3)2
……………1mg=0.001g so 20mg=0.02g Moles=0.02g/188=1g………………………………………………………………………………