# data[].attributes.body
https://www.youtube.com/watch?v=gICDEFNOJyM

Watch the video and tell me:

1- What is the condition of this reaction?
A. ambient temperature
B. high  temperature
C. very slow temperature

2- What color is the flame?
A. brown

B. yellow
C. white
D. blue

3- What is the product's name?
A. sulfur oxide: SO

B. sulfur dioxide: SO ₂
C. sulfur trioxide: SO₃

4- Write chemical equation and balance it.

S    +    O₂ → SO2
Read:   Sulfur reacts with oxygen to form sulfur dioxide.

5- What is the oxidation number of oxygen in a product?
A. 0

B. +1
C. -2
D. +2

# data[].attributes.body
https://www.youtube.com/watch?v=hqBqAqdfJLI

Watch the video and tell me:

1- What is the condition of this reaction?
A. ambient temperature
B. high  temperature
C. very slow temperature

2- What are products of this reaction?
A. water: H₂O

B. carbon dioxide: CO₂
C. both A and B

3- Write chemical equation and balance it.

C₂H₅OH     +    3 O₂ →  2CO₂ +3 H₂0
Read:
Ethanol reacts with oxygen to form cacbon dioxide and water.

4- Does ethanol burn in the air with or without smoke?
A. with smoke.

B. without smoke.

# data[].attributes.body
https://www.youtube.com/watch?v=UGABQrtm5p4

Watch the video and tell me:

1- What is the condition of this reaction?
A. ambient temperature
B. high  temperature
C. very slow temperature

2- What color is the product?
A. brown

B. yellow
C. white

3- What is the product's name?
A. iron (II) oxide: FeO

B. iron (III) oxide: Fe₂O₃
C. ferromagnetic oxide: Fe ₃ O ₄

4- Write chemical equation and balance it

3Fe    +   2O ₂ → Fe ₃ O ₄
Read:   Iron reacts with oxygen to form .................................

5- What is the oxidation number of oxygen in a product?
A. 0

B. +1
C. -2
D. +2