i dont understand it and i have a quiz tomorrow...
i know you have to do something with the ement but i dont rember what... could you show me a step by step way to do this problem......
What is the mass in grams of 3.40 moles of iron, Fe? (1 mole = 6.022 x 10 to the 23rd power)
2007-04-15 11:10:29 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
You need the molecular weight or molar mass, which you can get from the Periodic Table. From the table, the atomic mass of Fe is 55.847 g/mole.
So, the mass of 3.40 moles of Fe is 3.40 * 55.847 or 190 g/mole (with rounding).
For compounds, add the atomic masses of all the elements, in their right proportions, in the compound to get the molar mass of the compound. For example, the molar mass of hydrogen peroxide, H2O, is 2 * 1.0079 + 15.9994 or 18.0152 g/mole.
2007-04-15 11:29:04 · answer #1 · answered by TheOnlyBeldin 7 · 1⤊ 0⤋
A) convert .2 hundred g to moles employing atomic weight (on the periodic table) B) now you have it in moles. use that to detect the style of atoms employing avagodro's huge style (merely convert with that multiplication factor) sorry it is not too particular... it truly is been an entire summer time because of the fact that i had chem! good success and that i'm hoping it truly is clever!
2016-12-20 15:43:45 · answer #2 · answered by ochs 4 · 0⤊ 0⤋
3.40 moles x 55.84 g Fe / 1 mol Fe
189.9 g Fe
2007-04-15 11:25:06 · answer #3 · answered by John Smith 2 · 0⤊ 0⤋