A scientific journal publishes articles about new findings in science. For an article to be published in a scientific journal, it must be reviewed by trusted scientists and found to be accurate. Which of the following reasons describe why is it important for scientists to publish their findings in scientific journals? 1. To show that their experiment is valid and other scientists did not find mistakes in it.
2. To help other scientists learn about their experiment and help them repeat it.
3. To ask for help from other scientists in forming new hypotheses.

(A) 2 only
(B) 1 and 2
(C) 2 and 3
(D) 1, 2, and 3

Which of these best describes an ionic bond?

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced.be sure your answer has the correct number of significant digits.

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize