Answer:
Explanation:
To determine whether a covalent compound contains polar bonds you must deal with dipole moments and symmetry.
If a molecule has dipole moments and the charge is not symmetrically distributed then the covalent ompound is polar.
This is the analysis for the given compounds.
- First of all, AlCl₃ is an ionic compound, because the difference of electronegativities between Al (a metal) and Cl (a nonmetal) atoms is large enough to gender the formation of ions.
- CO₂: since C and O are two nonmetals, with different electronegativities, each C=O bond is polar. Nevertheless, it is a planar molecule (its geometry is O = C = 0) , so the molecule is completely symmetric, and the dipole moments of each C=O pair are cancelled. So, this is not a polar molecule.
- The structure of OCl₂ is similar to that of water (H₂O). So, it is not planar but bended. The bent geometry is due to the lone pairs on the oxygen. Also, due to steric repulsion between the relatively large chlorine atoms the bond angle is a bit larger than the normal angle. While for the H₂O molecules the bond angle is about 104.45°, it is about 110.9° for OCl₂. Then, being it bended, the dipole moment do not cancel and the molecule is polar.
<u>Answer:</u> The correct answer is Option B.
<u>Explanation:</u>
Oxidizing agent is the agent which oxidizes the other substance and itself gets reduced. It undergoes reduction reaction in which, it gains electrons and also the oxidation state of the substance gets reduced.
Reducing agent is the agent which reduces the other substance and itself gets oxidized. It undergoes oxidation reaction in which, it looses electrons and the oxidation state of the substance is increased.
For the given chemical equation:
Half reactions for the given chemical reaction:
Copper is loosing 2 electrons, thus it is undergoing oxidation reaction and is considered as a reducing agent.
Silver ion is gaining 1 electron per atom, thus it is undergoing reduction reaction and is considered as an oxidizing agent.
Hence, is considered as an oxidizing agent and therefore the correct answer is Option B.
The answer to #1 is A. The answer to number 4 is that identical twins are from one egg and fraternal twins are from two different eggs. I'm sorry I don't know the other ones.
Answer:
C
Explanation:
Ionic compounds consist of ions, which are formed when elements gain or lose electrons through donating or receiving.
The correct answer to this question is this one:
find the energy of one photon:
<span>E=h*<span>c/λ
</span></span>
divide the energy given by the energy of one photon of that wavelength
What I've done so far is convert wave length to m and energy to j.
E photon = h * x / wave length
E = (6.626 x 10^-43)(3.00 x 10^8) / 587 ^ -9 = 3.38 x 10 ^18 J
3.38 x 10 ^18 J x 1000 kj / 1 j = 3.37 x 10 ^ 16 Kj
609 kJ/ 3.37 x 10 ^ 16 Kj = 1.81 x 10 ^ 16
E = (6.626 x 10^-34)(3.00 x 10^8) / 587 ^ -9 = 3.38 x 10 ^19 J
3.38 x 10 ^19 J x 1000 kj / 1 j = 3.37 x 10 ^ -16 Kj
609 kJ/ 3.37 x 10 ^ 16 Kj = 1.81 x 10 ^ 18 but the answer is 1.81 × 10^24 photons
3.38 x 10 ^-19 J
should be negative
then 3.38 x 10 ^18 J x 1kJ/1000 J
you're converting from J to kJ.. just like meters to kilometres, you wouldn't multiply you would divide