A little boy is being pushed in a wagon by his mother. Suddenly, the little boy's mother stops to watch for cars before she crosses the street. The little boy's body continues to move forward in the stopped wagon until he tumbles out. The forward movement of the boy's body shows – * A) Newton's law of gravity.
B) Newton's law of inertia.
C) Newton's law of force and acceleration.
D) Newton's law of action-reaction.

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?