Answer:
From the balanced chemical equation 4 iron atoms react with 3 oxygen molecules to yield 2 iron (III) oxide formula units. Or 4 moles of iron atoms react with 3 moles of oxygen molecules to yield 2 moles of iron (III) oxide.
Answer:
the boiling point of HF is higher than H2 and F2
Explanation:
it is because inter molecular give is present in HF because of the Hydrogen bond present. Hydrogen bond is strong and will require much energy to break ,since no hydrogen bond is in the rest H2 and F2 has a low boiling point
Answer:
0.371
Explanation:
number of moles = mass / Ar
= 23.8g / 32.1 + (16.0 × 2)
= 0.37129485179 = 0.371 (3 s.f).
hope it helps :)
This site is used for learning, so to give a better understanding, here is a walkthrough.
So let's create a question:
Can a molecule have a dipole moment if it has no polar covalent bonds?
Here's the answer to that question:
Even though a molecule contains only one element, it can have a persistent dipole moment. The most common example is ozone (trioxygen). It is curved and has a partial positive charge on the center oxygen atom (similar to sulfur dichloride).
Permanent dipole moments are caused by an unequal, directed charge distribution within a molecule, not by changes in electronegativity. Such charge distributions are frequently caused by so-called "polar covalent bonds," which occur between atoms with markedly varying electronegativity. However, they are not the sole explanation.
So using this information, try to answer this question on your own.
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<span>The substance that works as a reactant in an enzyme catalyzed reaction is called the substrate</span>