Hydrogen bonding occurs between a hydrogen atom and an electronegative atom (e.g., oxygen, fluorine, chlorine). The bond is weaker than an ionic bond or a covalent bond, but stronger than van der Waals forces (5 to 30 kJ/mol). A hydrogen bond is classified as a type of weak chemical bond.
You have to use the equation F=ma and solve for m to get m=F/a. m=mass in kg F=force (in this case 350N) a=acceleration (in this case 10m/s²) when you plug everything in you should find that m=35kg