Is gold a compound or an element

Astringency is a chemoreceptive sensation since it occurs due to the irritation of mechano (tactile) receptors. It is experienced as a tactile sensation and is caused by tannins, polyphenols, aluminium salts and acids.

8. What is the mass in grams of 3.011 x 1023 molecules of water?

When a chemist collects hydrogen gas over water, she ends up with a mixture of hydrogen and water vapor in her collecting bottle. If the pressure in the collecting bottle is 97.1 kilopascals and the vapor pressure of the water is 3.

The object is called a because it is producing and has not yet.

Explain several different ways in which foods can become contaminated and how this can be prevented. Describe the symptoms of food poisoning and other illnesses that can result from ingesting contaminated food. What treatments are available?

Magnetism, reactivity, and fluorescence are three special properties used to identify minerals. true or false

Which of these molecules is least likely to form a hydrogen bond with a water molecule

George is writing an essay about the role of observation and inference in the development of the atomic theory. He wants to explain why it was more difficult to observe the presence of neutrons in atoms.

Which pair of statements below is correct? Multiple Choice An octet is formed via ionic bonding when one or more valence electrons are transferred from one atom to another.

If wave A has a frequency of 4.60 x 10^14 s-1, what is the wavelength in nanometers (show your work) ?