What is the density of oxygen of gas (O2) at STP

In an exothermic reaction where does the energy released as heat come from?

A fog over a lake. what two changes of state must occur to produce the fog? do the water molecules absorb or release energy during these changes of state? what happens to the motion of the water molecules as a result?

What can account for the increased potential energy when atoms are close together? Question options: A. Their opposite charges B. Electron repulsion C. The breaking of a bond D. Proton to Proton Repulsion

What do trees and plants provide us with

The density of iron is about blank times greater than water.

What will happen if we burn carbon monoxide In a closed room?

What elements does silver have.

What is the mass of 1 mole of carbon dioxide CO2?

An experiment is performed using 7 liquids; Methanol, Ethanol, Propanol, Butanol, Water, Pentane and Acetone. a.) The order of rates of evaporation from fastest to slowest are shown: Pentane, Ethanol, Methanol, Acetone, Water, Propanol and Butanol.

What does a molecule look like