- Water is a kind of liquid at room temperature
- Water is a kind of compound
- So, water is a liquid compound at room temperature

- Water is made of hydrogen and oxygen
- Hydrogen is a kind of gas at room temperature
- Oxygen is a kind of gas at room temperature
- Hence, water can be made by two gases hydrogen and oxygen

- Water is a liquid compound at room temperature
- Water can be made by two gases hydrogen and oxygen
- Hence, water is the liquid compound that can be made by two gases hydrogen and oxygen

- Water is the liquid compound that can be made by two gases hydrogen and oxygen
- Liquid state is a kind of nongaseous state
- Hence, water is the nongaseous compound that can be made by two gases

Hence, water is the nongaseous compound that can be made by two gases
Which nongaseous compound can be made from two elements that are gases at room temperature?
- Water is made of hydrogen and oxygen 
- Water is a kind of liquid at room temperature 
- Hydrogen is a kind of gas at room temperature 
- Liquid state is a kind of nongaseous state 
- Water is a kind of compound 
- Oxygen is a kind of gas at room temperature