In a chemical reaction, the mass of the products the mass of the reactants.

is greater than
is less than
is equal to
has no relationship to

is equal to

Explanation: According to the law of conservation of mass, mass can neither be created nor be destroyed. The mass has to be same on both sides of the reaction and to make this happen, the number of atoms of every element must be equal in reactants and products.

2 moles of hydrogen weigh=

1 mole of oxygen weigh = 32 g

Mass of reactants = 36 g

2 moles of water weigh=

Mass of products = 36 g

Thus mass of reactants = mass of products = 36 g

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

d.) circle motion requires a force to give it a centripetal acceleration.