What is the wind chill temperature when the air surface temperature is 10 f and the wind speed is 20

As a part of an experiment a student burns propane to produce carbon dioxide and water she remembers that she must follow the law conservation of matter when writing a balanced chemical equation which of these equation adheres to the law of conservation of matter

Can someone me with 1 to 4 plz. fast

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?