Question

Please help

Suppose you measure out 190 grams of a hypothetical element called Clarkanium. If its atomic mass is 38, how many moles do you have in your measured sample? Show your work and include units for final answer.

Answer 1

There are 5 moles of the element Clarkanium in 190 gm.

Step-by-step explanation:

The atomic mass of the element Clarkanium is 38 grams.

Given mass of the element = 190 gm

The mole of a substance is the mass of the substance containing same number of atoms that is in 12-grams of carbon-12.

So the atomic mass of the element is equal to the mass of 1 mole of the element.

Therefore number of moles can be calculated by dividing given mass of the element by atomic mass of the element.

`Number\ of\ Moles=(Given\ mass)/(Atomic\ mass)`

`Number\ of\ Moles=(190\ gm)/(39\ gm)=5`

Since Moles is calculated in number, so it has no unit.

Hence there are 5 moles of the element Clarkanium in 190 gm.