Answer:
El motor que las permite vencer la gravedad es la evaporación del agua que tiene lugar en las hojas.
Explanation:
C.) both secrete toxins and have thorns (It simply depends on what kind of plant it is)
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.
Removing salt from water will reduce it's density
We can use the dilution equation to find the volume of nitric acid needed to prepare a dilute solution
c1v1 = c2v2
c1 is concentration of concentrated solution and v1 is volume of concentrated solution
c2 is concentration of diluted solution and v2 is volume of diluted solution to prepared
substituting the equations
9.00 M x V = 1.25 M x 6.50 L
V = 0.903 L
903 mL of concentrated solution is required