Question

Can someone help me with this? thanks​

Answer 1

1 mole of lithium is 7 grams. we know this from it's relative molecular mass.

if 1 mole is 7 grams then x moles is 0.56 grams

we can equate them by saying (1/x)=(7/0.56)

after cross multiplying, we get 7x=0.56, x will be equals to 0.56/7

x=0.08 grams

Answer 2

0.08 mole is your answer

Answer:

we have

1 mole of li =7g

now

5.6×10^-1g of li =1mole/7g×5.6×10^-1 g=0.08mole