Balance the chemical equation

A) Na + Cl2---> NaCl

B) 2Na + Cl2 ---> 2NaCl

C) 2Na + Cl2---> 2NaCl

D) 2Na + 2Cl2> 2NaCl

Please a need help like ASAP

The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. a large increase in pressure will a. lower the freezing point b. raise the freezing point c. lower the boiling point d. raise the triple point e. lower the triple point