Assume a beaker of pure water has been boiling for 30 minutes. what is in the bubbles in the boiling water? a) heat. b) air. c) oxygen gas and hydrogen gas. d) gaseous water.

The bubbles in the boiling water is gaseous water.

Explanation:

The conversion of water into its vapors is a physical change.

Physical change is defined as the change in which, change in shape, size etc.. takes place. No new substance gets formed in these reactions.

For Example: Melting of ice

Vaporization is defined as the physical process in which liquid particles get converted to gaseous particles.

When water is boiling for 30 minutes, the water particles are getting converted to water vapors.

Hence, the bubbles in the boiling water is gaseous water.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.