Homework Statement
4Al + 3O2 = 2Al2O3
What number of O-atoms will react if 45dm3 of the gas reacts with an excess of Al?
The answer is apparently: 4 atoms
Homework Equations
The Attempt at a Solution
Using the formula n=V/Vn (or the law stating that any gas occupies 22.4dm3 at...
I'm really sorry- worked it out from another thread:)
Percent to mass,
Mass to mole,
Divide by small,
Multiply 'til whole.
Assume 100g of compound. Change % to g. Divide these masses by their molar masses to get moles. Divide each mole amount by the smallest mole quantity of the group. You'll...
Homework Statement
Determine the Empirical Formula of a compound which, when analyzed, is shown to consist of 62.07% carbon, 27.59% oxygen and 10.34% hydrogen.
The answer is supposedly C3OH6
Homework Equations
The Attempt at a Solution
First,I started by writing the ratio: C : O : H
Then...