What is the evidence of a chemical reaction when the fireworks go off

Match the following. 1. to bend - opaque - 2. not allowing light to pass through - refract - 3. only partially clear - translucent 4. clear transparent

Consider the following unbalanced reaction for the combustion of hexane: C6H14 (g) + O2 (g) - -> CO2 (g) + H2O (g) Balance the equation and determine how many grams of CO 2 gas will form when 5.35 grams of C6H14 reacts with excess O2.

When you coast down a hill on a bike you move faster and faster. Then when you keep coasting on a level surface, you eventually stop moving. What cause you to stop? A. No force is acting on your bike on the level surface, so it stops moving. B.

The transfer of thermal energy between two bodies at different temperatures is known as

Write structures for the three isomers of the aromatic hydrocarbon xylene, C6H4 (CH3) 2.

Is heat of fusion an extensive or intensive property? Why?

How many moles of oxygen gas are produced from the decomposition of six moles of potassium

Why do magnesium and oxygen combine?

When a chemical reaction takes place, the number of atoms of each element in the reactants

A scientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. Which term most likely describes what she is measuring?