Chemical equations show the ratio of reactants and products involved in a chemical reaction. For example, 2 H2 + O2 → 2 H2O. How do balanced equations
satisfy the Law of Conservation of Mass?*
A. The number of reactant molecules equals the number of product molecules.
B. Every atom present in the reactants is also present in the products.
O C. The number of reactant molecules adds up to the number of product molecules.
D. The energy stored in bonds before and after the reaction is the same.

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.

Why does asexual reproduction result in offspring with identicle genetic variation