All substances are composed of which type of matter? a. ions b. mixtures c. elements d. molecules

Express the following number in scientific notation. 0.026890 =

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?