How many moles are in 2.8x10^10 particles of s?

Will mark brainliest 26. which of these statements are true? (3 points) a. gases are compressible b. gases fill their containers completely c. the pressure of a gas is independent of the temperature d. gases have mass e. gases exert pressure f. the pressure of a gas is dependent on the volume g. gas pressure results from the collisions between gas particles h. gases have a definite volume and shape

List four observations that indicate that a chemical reaction may be taking place

Express the following number in scientific notation. 0.026890 =