Directions: Use the equations below to answer the following questions, Zn(s) + S(s)--ZnS(s)
1. What are the reactants in this chemical reaction?
2. What is the product?
3. What is the physical state of both the reactants and the products?
4. According to the law of conservation of mass, if the total mass of the product in this chemical
reaction is 14 g, what must the combined masses of the reactants be?
2H2(g) + O2 (g)-2H2O(1)
5. What name describes the product in this reaction?
6. What names describe the reactants?
7. What are the physical states of the reactants in this reaction?
8. What is the physical state of the product?
9. What do the coefficients tell you about the ratio of the reactants?
The McGraw-Hill Companies, Inc.
10. How many units of the product are produced?
Directions: Write chemical equations for the following reactions

Is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance