Which substance would have the highest melting point, based on electronegativity?
H2S
H2O
H2Se
H2Te
H20?
Hydrogen bonds can be found between molecules of which of the following substances?
HI
CH4
H2
NH3
not sure
Will be h2O and hidrogen will found between CH4
To determine which substance would have the highest melting point based on electronegativity, we need to consider the electronegativity values of the atoms involved. The greater the electronegativity difference between the atoms in a compound, the stronger the bond formation and therefore, the higher the melting point.
Comparing the electronegativity values of the elements:
H (Hydrogen) - 2.20
S (Sulfur) - 2.58
O (Oxygen) - 3.44
Se (Selenium) - 2.55
Te (Tellurium) - 2.10
Based on these values, we can determine that H2O (Water) would have the highest melting point, as oxygen (O) has the highest electronegativity value among these elements.
For the question about hydrogen bonds, remember that a hydrogen bond occurs when a hydrogen atom is bonded to a highly electronegative element (such as oxygen, nitrogen, or fluorine). So, we need to identify which substances contain a hydrogen atom bonded to a highly electronegative element.
Among the given substances, HI (Hydrogen Iodide), CH4 (Methane), H2 (Hydrogen gas), and NH3 (Ammonia), only NH3 (Ammonia) has a hydrogen atom bonded to a highly electronegative element (nitrogen). Therefore, NH3 (Ammonia) can form hydrogen bonds between its molecules.
Thus, the correct answer is NH3 (Ammonia).
To determine which substance would have the highest melting point based on electronegativity, we need to understand the relationship between electronegativity and melting point.
Electronegativity is a measure of an atom's ability to attract electrons in a chemical bond. Generally, higher electronegativity means a stronger bond between atoms.
In the given options, we have H2S, H2O, H2Se, and H2Te. All of these compounds consist of hydrogen and a heavier element (sulfur, oxygen, selenium, and tellurium).
To determine which one has the highest melting point based on electronegativity, we need to compare the electronegativity of the heavier elements.
Sulfur (S) has an electronegativity of 2.58, oxygen (O) has an electronegativity of 3.44, selenium (Se) has an electronegativity of 2.55, and tellurium (Te) has an electronegativity of 2.1.
Based on electronegativity, oxygen (O) has the highest value of 3.44 among the given options. Therefore, H2O (water) would have the highest melting point among H2S, H2O, H2Se, and H2Te.
Now, moving on to the next question about hydrogen bonds:
Hydrogen bonds can be found between molecules of substances that contain hydrogen directly bonded to electronegative atoms such as oxygen, nitrogen, or fluorine. Hydrogen bonding occurs when the partially positive hydrogen atom in a molecule is attracted to the partially negative atom of another molecule.
Out of the options provided (HI, CH4, H2, NH3), hydrogen bonds can be found between molecules of HI (hydrogen iodide) and NH3 (ammonia) since they both contain hydrogen bonded to electronegative atoms (iodine and nitrogen, respectively). CH4 (methane) and H2 (hydrogen) do not have hydrogen bonding because they do not contain hydrogen bonded to electronegative atoms.
Therefore, the correct answer would be HI and NH3.