Total # Posts: 19
A student was synthesizing aspirin in the lab. Using the amount of limiting reactant, she calculated the mass of aspirin that should form as 5.24g. When she weighed her aspirin product on the balance, it mass was 2.23g. What is the percent yield of the aspirin?
March 27, 2013
I'm not sure how to do this. Determine the actual ratio of 18O:16O for the following substances. a) Snow falling in Greenland at a temperature of -20 degrees C b) Water vapor in equilibrium with VSMOW c) Pore-water from sediments in the North Atlantic corresponding to the ...
February 17, 2013
a sandbag is dropped from an unknown height. h, from the ground. if after 5 sec. it is located one half the height from which is thrown , at what height was it dropped? b. what is its speed after 5 sec.? c. what is its speed when it strikes the ground?
November 29, 2012
1. In preparing a budget for a day care center, you must plan for taxes. As an employer, you must pay part of each employees _______ tax. A. Social Security C. state income B. federal income D. local 2. Youre trying to plan an activity for your third graders, who ...
July 30, 2010
We have been given a list of words and have to write the plural of them. I have found the answer to each of the words but now have to write rule for each. I know that words ending in ch, x, s or s-like sounds will all end in es. I am having trouble find a rule for words like ...
November 4, 2009
a new organism is found that is multicellular, does not have a backbone, and has six legs. while studying the organism, you notice that it develops somewhat like a grasshopper. explain how you would classify this organism, and discuss the stages of its development
September 30, 2008