Answer:
they are single cells that lack a nucleus and tend to live in extreme conditions.- B.
There are two iron atoms and three oxygen atoms in each molecule of Fe2O3. So that's five atoms per molecule.
One mole of any molecular substance contains <span>6.02×1023</span> molecules. Since there are two iron atoms in each of the molecules we're considering, there will be <span><span>(6.02×1023)</span>⋅2=1.204×1024</span> iron atoms in a whole mole of them.
But we're considering 0.550 mol, so multiply by 0.550:
<span>n=(0.550</span> mol<span>)⋅<span>(3.01×1024</span></span> atoms/mol<span>)=6.62×1023</span> iron atoms.
Answer:
The answer to your question is 1.25 moles of C
Explanation:
Reaction
5C + 2SO₂ ⇒ CS₂ + 4CO
Check that the reaction is balanced
Reactant Element Product
5 C 5
2 S 2
4 O 4
Use proportions to find the moles of C needed.
5 moles of C ----------------- 2 moles of SO₂
x moles of C ---------------- 0.500 moles of SO₂
x = (0.500 x 5) / 2
x = 1.25 moles of C
Answer:No of moles of potassium sulfide (K2S)=0.61671moles
Explanation:
No of moles is given as Mass/ molar mass
Here Mass of potassium sulfide (K2S) =68 grams
Molar mass of potassium sulfide (K2S) = 39.0983 x 2 + 32.065 =110.2616 g/mol
No of moles =68 grams /110.2616 g/mol
=0.61671moles
