Answer:
Kr- Dispersion Forces
H2O- Hydrogen Bonding
CHCI3- Dipole-Dipole Forces
HF- Hydrogen Bonding
C2H6- Dispersion Forces
HBr- Hydrogen Bonding Forces
Explanation:
Dispersion forces occurs in all substances. They are the dominant intermolecular interaction in all non polar substances such as C2H6 and Kr.
Hydrogen bonding occurs when hydrogen is bonded to a highly electronegative atom such as Cl, Br, O etc. It is the dominant intermolecular interaction in HF, HBr and H2O.
Dipole-Dipole interactions occur when a permanent dipole exists in a molecule such as in CHCI3
Answer:
Lead, Pb.
Explanation:
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In this case, since the molar mass of the compound is 293.8 g/mol, and the molecular formula is NaXO₄, we infer that the molar mass is computed via:
Thus, we can solve for the atomic mass of X as shown below:
Thus, the element whose atomic mass is about 206.8 g/mol is lead (207.2 g/mol) even when it is not properly a transition metal.
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Answer:
Because the sugar flour and eggs can no longer be separated. The properties of the materials have changed so it's a chemical change
Natural selection is is the adjustment of genes throughout generations based on factors that help it survive.
The answer is A