When oxygen (O) reacts with iron (Fe), it produces rust (Fe2O3). In a closed system, how much oxygen must react with 120 grams of iron to produce 580 grams of rust?

Explanation:

Here, I show you why it is not possible to produce 580 grams of rust with 120 grams of iron.

A. Molar masses of the substances:

B. The chemical equation is:

     4Fe   +   3O₂   →   2Fe₂O₃

How many grams of iron are there in 580 grams of rust (Fe₂O₃) ?

1. Convert the mass of Fe₂O₃ into number of moles:

2. Calculate the number of moles of Fe in 3.6320 mol of Fe₂O₃

There are 2 moles of Fe per mole of Fe₂O₃:

3. Calculate the mass of 7.2640 moles of Fe:

Thus, 120 grams of Fe is too little to produce the mentioned amount of rust; you need about 406 grams of Fe to produce 580 grams of rust.

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates