One of these substances is a liquid at room temperature. which one? one of these substances is a liquid at room temperature. which one? sih4 co2 nh2oh cf4

Those compounds are said to be liquids at room temperature whose melting point is less than 25 °C and boiling point is greater than 25 °C.

Silane:  (SiH₄)

                      Melting Point  =  -185 °C

                      Boiling Point  =  -112 °C

Carbon Dioxide:  (CO₂)

                      Melting Point  =  -56.6 °C (Triple Point)

Hydroxylamine:  (NH₂OH)

                      Melting Point  =  33 °C

                      Boiling Point  =  58 °C

Tetrafluoromethane:  (CF₄)

                      Melting Point  =  -183.6 °C

                      Boiling Point  =  -127.8 °C

Result:
           Hence, it can be concluded that none of the given compound is in liquid state at Room temperature. But, approximately speaking we can conclude that comparatively if the day is hot then Hydroxyl Amine (NH₂OH) will exist in liquid state. :)

Of course: ) what’s your name ?

Ithe undersigned only for use your own email and delete any and copies and of the itself and to be there is a good timewhat does a decrease in temperature indicate about the molecules in a sample of liquid water? decreased chemical energy of the moleculesdecreased kinetic energy of the moleculesincreased chemical energy of the moleculesincreased kinetic energy of the moleculeshow does a sample of helium at 15 â°c compare to a sample of helium at 215 k? the helium at 15 â°c has a higher average kinetic energy than the sample at 215 k.the helium at 15 â°c has lower nuclear energy than the sample at 215 k.the helium at 15 â°c has slower-moving atoms than the sample at 215 k.the helium at 15 â°c has smaller atoms than the sample at 215 k.