The total pressure in a gas cylinder containing oxygen gas and helium gas is 900 kPa. The oxygen gas has a pressure of 740 kPa, so what is the pressure of the helium gas?

An alcohol thermometer makes use of alcohol's changing in order to measure temperature. as the temperature goes up, the alcohol contained in the thermometer increases in volume, filling more of the thermometer's tube.

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

What is formed when amino acids form long chains or polymerize