The main substances in air are N2 (nitrogen), O2 (oxygen), CO2 (carbon dioxide), H2O (water), and Ar (argon). Which of these substances are elements? Which are compounds? Which are molecules?

What type of reaction always takes one large molecule and breaks it down into its smaller pieces? A. a synthesis reaction B. a disynthesis reaction C. a combustion reaction D. a decomposition reaction

When liquid silver nitrate and liquid sodium chloride or combine, solid silver chloride forms along with a new liquid, sodium nitrate. What substance represents the precipitate

Where do new root cells from? A. behind the root cap B. inside root hairs C. on top of the root cap D. under the cortex

What does the nucleus of one atom want to do to the electrons of a nearby atom?

What is formed from joining positive and negative ions

What characteristics of water allow it to have high surface tension?

Obtaining scientific data from a distance is called?

What is organic chemistry?

What is the total number of electrons shared in a double covalent bond between two atoms? (1) 1 (3) 8 (2) 2 (4) 4

Which method separates mixtures according to the rates their components travel through a material? yhaoo answers?