Endothermic means it absorb energy from surrounding and its sign is positive so when it absorb this energy the flask or the container become colder
I think the awnser is C chromosomes
Number one is the balanced equation because both sides have 1 Ca 1 C and 3 Os
1 density affects the behavior at plate boundaries by how far they are apart from each other.
2 the factors that affect occurs at a plate boundary to make sure they don't collide together.
Water contains more electronegative oxygen. Hydrogens bonded directly to oxygen atoms gets partial positive charge which means the electron density on hydrogen atoms has decreased and a partial negative charge forms on oxygen atom. This partial negative charge on oxygen and partial positive charge on hydrogen attracts each other and forms intermolecular force called Hydrogen Bonding.
H₂O ------ H₂O ------- H₂O
The dashed line show hydrogen bonding.
In case methane hydrogen atoms are bonded to Carbon atoms and there is very small electronegativity difference between them, hence, fails to form partial positive and partial negative charge, hence, no hydrogen bonding. Such non polar compounds obtain special type of intermolecular interactions called London-Dispersion Forces which are weaker compared to Hydrogen bond interactions.
Result:
Water exist as liquid due to strong Hydrogen bonding between water molecules, while, methane lacks such interactions.