Question

How many grams are contained in 2.00 mol of neon?

Answer 1

`"2.00 mol Ne"` has a mass of `"40.4 g"`.

Explanation:

Multiply the given moles times the molar mass of neon, `"20.180 g/mol"` (periodic table).

`2.00cancel"mol Ne"xx(20.180"g Ne")/(1cancel"mol Ne")="40.4 g Ne"`

Answer 2

2 moles `xx` 20.2 g/mol = ??

Explanation:

Assume that:
n - number of moles
m - mass of substance
M - molar mass
`n = m -: M`

2.00 moles (n) of Ne has been provided for you.

Now you have to find the molar mass (M) of Ne. If you look into your periodic table, the molar mass of Neon is 20.2 g/mol.

Final step:
flip-over the formula and it becomes `m = M xx n`.
The mass of Neon is: [m = 20.2 g/mol `xx` 2 moles]
= 40.4 grams.

Therefore, 40.4 grams are contained in 2 moles of Neon.