Is oxygen gas (O2) a compound or an element? Is hydrogen gas (H2) a compound or an element?

What is the final concentration (m) of a solution prepared by diluting 50.0 ml of a 6.00 m kcl solution to a volume of 1.00 l?

How does prairie grasses protect soil

When might neutralization reactions be used in a laboratory setting?

Wrapping a hot dish of food in shiny aluminium foil seems to keep the dish warm longer than wrapping it in clear plastic film. aluminium is much better conductor of heat than plastics, so why does it impede the flow of heat so well?

How are convection and conduction affected by paving over a grass field?

How many milliliters of a 0.7% stock solution are required to make 2 l of 0.2% solution? how many ml of solvent will be required to carry out the dilution?

What percentage of the naphthalene molecules emitted a photon?

In an endothermic reaction, heat is absorbed from the surroundings. How does this affect entropy? A. The particles in the surroundings move slower and have decreased entropy. B.

The temperature of a sample of liquid water changes from 50°C to 30°C. Which statement best explains the change that must happen at the molecular level? A. The molecules move more quickly and their average kinetic energy increases. B.

The most important reason why solid sodium hydroxide is not used as a primary standard is