BALANCING CHEMICAL EQUATIONS

1. ___ H2 + ___ O2 → ___ H2O
2. ___ Mg + ___ O2 → ___ MgO
3. ___ Li + ___ F2 → ___ LiF
4. ___ K + ___ O2 → ___ K2O
5. ___ H2O2 → ___ H2O + ___ O2
6. ___ Al + ___ Cl2 → ___ AlCl3
7. ___ Ag2O → ___ Ag + ___ O2
8. ___ H2 + ___ N2 → ___ NH3

1. _2_H2 + ___ O2 → _2_ H2O

2. _2_ Mg + ___ O2 → _2_ MgO

3. _2_ Li + ___ F2 → _2_ LiF

4. _4_ K + ___ O2 → _2_ K2O

5. _2_ H2O2 → _2_ H2O + ___ O2

6. _2_ Al + _3_ Cl2 → _2_ AlCl3

7. _2_ Ag2O → _4_ Ag + ___ O2

8. _3_ H2 + ___ N2 → _2_ NH3

Explanation:

1. 2 and 1=2

2. 2 and 1=2

3. 2 and 1=2

4. 4 and 1=2

5. 2=2 and 1

6. 2 and 3=2

7. 2=4 and 1

8. 3 and 1 =2

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.