Question

1) it exists as a gas at room temperature and is needed for respiration__________

2) it is used in thermometer.

3)it is a gas and exists in the largest quantity in air ________
4) it is a reddish-orange element used to make vessels.____________​

Answer 1

1,

Carbon dioxide, CO2, is a gas during room temperature, and is a gas in the earth¡¯s atmosphere. It is a made up of about 385 ppm in the Earth's atmosphere. ... Carbon Dioxide, CO2, is a colorless, odorless, incombustible gas, present in the atmosphzere and formed during respiration.

Explanation:

2,

When the carbon dioxide concentration goes up, temperature goes up. When the carbon dioxide concentration goes down, temperature goes down.

3

The most abundant naturally occurring gas is Nitrogen (N2), which makes up about 78% of air. Oxygen (O2) is the second most abundant gas at about 21%. The inert gas Argon (Ar) is the third most abundant gas at

4

Copper is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color

Answer 2

Answer:

1.CO2

2. Mercury

3. Nitrogen

4. Copper