Answer :

barnuts

What is made by steam and air and helium

 

To be able to know what is made by steam and air and helium, we must first know the states of each substance. Assuming standard or normal conditions, we check for their states:

steam = is water, H2O, in gaseous state (gas)

air = in atmospheric conditions this is mixture of oxygen and nitrogen (gas)

Helium = in atmospheric conditions this exist as a gas (gas)

 

Therefore what is made by mixing the three substances would simply be a mixture of gases. Specifically the components in the mixture are:

H2O, Oxygen, Nitrogen, Helium

 

Answer:

Mixture of gases