Answer:The physical changes that are endothermic are melting, vaporization and sublimation.
Explanation:
Answer:
B. Ionic
Explanation:
RbCl is ionic compound formed from the combination of rubidium (a strongly electropositive element) and chlorine (a strongly electronegative element).
The transfer of an electron from rubidium to chlorine leads to the formation of two oppositely charged ions Rb⁺ and Cl⁻.
In a solid crystal of RbCl, the major intermolecular forces of attraction are electrostatic forces of attraction between oppositely charged ions in the molecules of the crystalline solid.
Ion-dipole attraction only occur when the solid is dissolved in a polar molecule like water. Dispersion forces as well as dipole-dipole forces, though present are weak forces and contribute very little to intermolecular attraction. Hydrogen bonding is not present as there are no hydrogen atoms in solid RbCl.
Answer:
A. They keep the coastal areas that they boarder warmer.
Explanation:
Water have large heat capacity so it warm up very slow, but also cool down very slow. Usually warm water currents go from equator, where they get warm, to north, where they slowly releasing heat that warm they border.
C. "New atoms are formed as products" is not true.
Answer:
Cycle B
Explanation:
the provirus is when the phage genome is incorporated into the host's chromosome so in this figure that would be B.
