Answer:
Oxygen
Explanation:
If two balloons are filled with hydrogen gas and helium gas respectively, then we want to identify what gas is in each balloon, we have to do so by exposing the both balloons to flame in an oxygen atmosphere.
Hydrogen combines with oxygen in the presence of a flame with quite a loud sound and the flame is sustained but when a flame is brought near helium gas in a balloon, the gas will only make a little sound when exposed to the flame and extinguish the flame.
The reason for the explosion of the gas in the hydrogen balloon is that combustion of hydrogen gas is exothermic. The heating up of surrounding air molecules leads to a sudden explosion.
However, the helium balloon makes a little sound when the balloon is ruptured releasing helium gas which extinguishes the flame.
Answer:
Sulfate loses 2 electrons to sulphur dioxide.
The seasons are caused by the tilt of the Earth on its axis is the correct answer.
Summer starts based off each countries calendar so that can't be right. And during Summer days are longer because we have more sunlight so that one isn't right. And as the earth revolves around the sun it stays in relatively the same distance away so that one is incorrect.
Hope this helps. (;
Answer: 1
Explanation: coarse adjustment