Combustion reactions use which element as a reactant?

When a bond forms between two atoms A. protons are lost. B. neutrons are lost. C. energy is released. D. energy is absorbed.

Reaction rate depends on how many molecules are coming into contact with each other with enough energy to react. Increasing the concentration of reactants will increase A. how often they come in contact B. the amount of energy they have C.

Which of the following most likely happens when thermal energy is removed from a chemical reaction? Rate of reaction becomes faster Fewer collisions occur between particles The temperature of the reaction increases Particles start moving at greater

Which statement would most likely come from a sociologist using the structural-functional approach? A. The concept of what is acceptable is determined by people in power; therefore, punishments for deviance are unfair. B.

When the volume of a gas is changed from 1145 ml to 765 ml, the temperature will change from? k to 640 k?

How does adding salt affect the surface tension of water? if it increases surface tension, will it always increase it?

Which usually has a higher temperature? A city or the areas around the city?

Toluene and pyridine form ideal solutions. Consider a solution of toluene and pyridine prepared at 25°C. Assuming that the mole fractions of toluene and pyridine in the vapor phase are equal, calculate the composition of the solution.

Formula for water what does the lack of a subscript after those O indicate

Why do the chemical properties cycle through each period? Every eighth element starting with hydrogen restarts the transition from metal to inert gas. Elements with atomic numbers which are multiples of eight start a new period.