Nouncompounds
Verbcompounds
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Compound may refer to:
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GNU Free Documentation License When writing the formula for compounds, how do you know when to use parentheses? Q. One thing I do not understand in chemistry is when a question asks 'write the formulas for the following ionic compounds', how do you know when your answer needs parentheses? For example, one question asked the formula for copper(II) nitrate, the answer is Cu(NO3)2. But in a question asking for the formula for sodium hydroxide, the answer is NaOH (with no parenthesis). So how do you know when you are supposed to use parentheses? Asked by xlogical.harm - Thu Oct 16 16:20:34 2008 - - 3 Answers - 1 Comments A. You use parentheses when the formula contains more than one of the same polyatomic ion. in the example you gave, nitrate is a polyatomic ion of NO3 with a charge of negative 1. copper (II) has a charge of positive two. So to balance it out, you need two nitrates. you cannot write NO32 because then it looks like there is 32 oxygen. when you write it as (NO3)2, you have two polyatomic ions. Answered by amanda - Thu Oct 16 16:29:20 2008 How to differentiate between two compounds with identical melting points without using spectroscopy ? Q. How to differentiate between two compounds with identical melting points without using spectroscopy ? The compounds with near identical melting points are benzopinacol and benzopinacolone. Asked by Science456 - Sat Jan 30 19:47:46 2010 - - 2 Answers - 0 Comments A. What you do is called a mixed melting point. If you take a couple of samples of your unknown compound and mix them each with about an equal amount of one of the two compounds, one will be a mixture while the other will be pure substance. The pure sample will melt at the same melting point as the unknown, while the mixture will show a melting point depression. The unknown must be the compound that you mixed with it that gave no MP depression. Answered by Steve Watton - Sat Jan 30 20:31:36 2010 What are 4 organic compounds in the human body?
Q. What are four organic compounds found in living things and what are their function in the human body? Asked by Ekalb - Wed Feb 3 20:49:58 2010 - - 1 Answers - 0 Comments A. carb. lipids, proteins, nucleic acids Answered by Yasha D - Thu Feb 4 00:37:11 2010 From Yahoo Answer Search: "compounds"  news.google.com Science Daily (press release) Sometimes, however, this is not the case and in certain compounds , known as ferromagnetics, magnetic properties subsist at a macroscopic scale and can ... and more » news.google.com Reuters Other poster presentations will cover a variety of preclinical data and preclinical and clinical biomarker data for six compounds . ... and more » news.google.com PR Newswire (press release) "This review article once again demonstrates the unique advantages of linking Fleximer to cancer compounds . Specifically, Mersana's development of a ... and more » From Google News Search: "compounds"  observedtrials.net 364px x 500px | 25.80kB [source page] gallery and more specific pictures available upon request Pad compounds tested so far 17 and counting IMG http www observedtrials net album data 500 medium compounds jpg Coating pictures somewhat worn dusty IMG From Yahoo Image Search: "compounds"  news.ifas.ufl.edu stu ue, 09 Feb 2010 16:53:08 GM In work published in the January issue of The Plant Journal and the February issue of Phytochemistry, the researchers describe how various genes in petunias help regulate the amount of the 13 major aromatic . compounds. in that flower's ...  manipef1.com unknown Sat, 06 Feb 2010 11:53:26 GM Bridgestone will again have four dry tyre . compounds. (Hard, Medium, Soft and Super Soft) to cover the 19 race calendar, with two selected per race weekend. Two of these four . compound. designations of 2010 dry tyre: the Soft and Super Soft ...  prometheus6.org Prometheus 6 hu, 21 Jan 2010 21:15:18 GM The Supreme Court . compounds. its error, or, Maybe corporations DO have the right to bear arms. Posted January 21st, 2010 by Prometheus 6. in. Supreme Court. I would dearly love to see an official statement of which constitutional rights ... From Google Blog Search: "compounds" |
