Based on the information in figure 2 which substances would be gas is at 0°c

As we can see from the table that boiling point of Nitrogen and Hydrogen is -195.8 and -252.9 degree Celsius.

So at 0 degree Celsius both of the gas will reach to the boiling point and will convert into the gaseous state

while other two substance will remain in liquid state or solid state at 0 degree C because they both have greater boiling temperature or boiling temperature greater than zero.

So the answer would be

Nitrogen

Hydrogen

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.