Science Questions: Quick Answers!!!!!

If you put a beaker over the burning of the candle, you can see water droplets at the bottom of the beaker, indicating that water has been generated by combustion.

The generated gas is then passed into a beaker filled with clarified lime water, and the turbidity of the clarified lime water can be seen, indicating that CO2 is generated.

Cover the burning candle with a larger glassware and seal the glassware, and constantly drip cold water into the glassware as it burns, with water droplets --- water on the top of the glassware.

2- The candle flame becomes smaller, and finally the candle goes out--- carbon dioxide inhibits combustion.

It's in this book.

Method: Put a dry cold sleeve on the flame If you see water droplets, it proves that the candle burns to produce water, invert this beaker to clear lime water, if there is a white precipitate, it proves that the candle burns to produce carbon dioxide.

The gas passes through anhydrous copper sulfate and clarified lime water in turn, anhydrous copper sulfate turns blue, and clarified lime water is turbid.

First, the combustion gas is passed into the anhydrous copper sulfate, and then into the clarified lime water, the phenomenon: anhydrous copper sulfate turns blue, and the lime water becomes turbid.

Dip a glass piece in lime water and muddy the lime water on the side facing the candle directly above the candle.

Place a piece of dry glass on top of the candle with small droplets of water.

1 Cover a burning candle with a beaker and you will see water beads forming on the top

2 Cover the burning candle with a beaker and place a small cup of lime water in the beaker to make the lime water cloudy

24.The phone can't see the diagram Sublimation Sublimation 5Watering the flowers with rice washing water 6Evaporation 3 types 8Evaporation, vaporization, absorption (the phone can't see the picture, 25 questions can think of liquid wisdom, but 24 questions can't imagine that it can't rise, sorry) Qi bury the old.

8.Release, absorption, absorption.

9.No drawing. 10.0, absorption.

11.1) Hydrogen, oxygen, 2:1

Electrolysis of 2) 2 H2O --2 H2 + O23) hydrogen and oxygen.

12.No drawing.

Water 14Medicine spoon, regent.

2) Same Different (3) Density (4) 50

4。Sublimation; Endothermic during sublimation; Liquefy; Small water droplets.

2 same. Different. 3 density.

4 sublimation, sublimation, endothermy, liquefaction.

3.I don't understand the steps to make a ball judge in Diqiao Town.

7.The distance on the orange is 1 cm, and the actual distance is 20km; 3 cm.

Mingai CD, AC< bd, latitude 60 north, longitude 0.