According to the law of conservation of matter, we know that the total number of atoms does not change in a chemical reaction and thus mass is conserved. Consider this model of a chemical reaction:
Reactants
Products
+ ?
The Substances
Undergoing Reaction
The Substances
Generated by the Reaction
How many oxygen molecules should be added to the reactants side to obey the law of conservation of matter?

Ineed with a, b, c, d, and e on the long answer

Which statement describes the appearance of a temperature-vs.-time graph? a horizontal line shows that the temperature increases at a constant rate over time. a vertical line shows that the temperature decreases at a constant rate over time. horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

Often on a topographic map, every fifth contour line is darkened. what is this line called? a. key b.slope c.benchmark d. index contour