Molar mass of FE2O3=2(55.85)+3(16)=159.7
2.56g*1mol/159.7*2mol/1mol*55.85g/1mol=1.79g
Fe + 2 HCl --> FeCl2 + H2 <span>
2 Al + 6 HCl --> 2 AlCl3 + 3 H2
<span>total moles H2 = 0.100 g / (2.016 g/mol) =0.0496 mol
let x = mass Fe
let y = mass Al
</span></span>
<span>Total mass of alloy is:
<span>x + y = 2.07
</span></span>
<span>Performing H2 balance based on stoichiometry:
<span>x / 55.847 + 3 y/2 / 26.9815 = 0.0496
x / 55.847 + 3y/53.963 = 0.0496
<span>53.963 x + 167.541 y = 149.48
<span>53.967 ( 2.07 - y) + 167.541 y = 149.48
<span>111.71 - 53.967 y + 167.541 y = 149.48
<span>113.6 y = 37.77
y = 0.332 g = mass Al
% Al = 0.332 x 100/ 2.07 = 16.06 %
<span>% Fe = 83.94%</span></span></span></span></span></span></span>
The second shell is left at 7, it should be filled to 8 to go to the next shell.
Neutrons, Electrons, and Protons
Neutrons are the neutrally charged particles that are found in the nucleus.
Protons are the positively charged particles that are found in the nucleus.
Electrons are the negatively charged particles that are found in the atom's orbitals/shells
Answer:
3Na2SO4
Explanation:
3Na2SO4
# of molecules: 3 moles of Na2SO4 or 3 × 6.22 × 10^23 molecules.
# of elements: 3 elements l
Name of element: = Sodium, S = Sulphur, O = Oxygen
# of atoms: Na = 6 atoms, S= 3, O= 12
Total # of atoms: 21
The #3 is a Coefficient.
Please mark branliest if you are satisfied. Thanking in anticipation.