relative atomic mass?

Question

i'm not looking to be given the answer, just maybe a few pointers in the right direction. the question is:

one mole of Ti has a molecular formula Ti3O5. one mole of the compound has a mass of 146g with one mole of O2 gass having a mass of 32g

so what is the relative atomic mass of the element Ti.

i worked it out at 66..but im not sure if i am right or not.

any help would be apreciated but i'm not looking for the answer.

Answer 1

If Ti3O5 has a molar mass of 146g, and O2 has a molar mass of 32 g:

Step 1: Use the mass of O2 to find the mass of a single Oxygen atom.
Step 2: Multiply the answer from step 1 by 5, and subtract that from Ti3O5's molar mass.
Step 3: Divide the remainder by 3 (since there were 3 Ti atoms in the compound).

What's left is Ti's mass.

Answer 2

you have to take into acount that for every one mole of Ti3O5 you have 3 moles of TI and 5 Moles of O
you are on the right track but a mole of Ti would weigh 1/3 the answer you gave

hope that helped