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What is an example of single-replacement reaction in the human body?
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Calculate the percent of a strontium sample left after 100 years. A) Ne B) Xe C) Ar D) Rn E) Kr 2. The half-life of strontium-90 is 28.1 years. __________________________ Date: _____________ 1. Which of the following noble gases is least likely to react with fluorine? A) Ne B) Xe C) Ar D) Rn...
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please show working to derive the answer. thank you
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carbon disulfide, CS2, has a normal boiling point of 46C and a heat of vaporization of 26.8 KJ/mol. What is the vapor pressure of Carbon disulfide at 35C?
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oxyacetylene torches used for welding reach temperatures near 2000degrees Celsius. the reaction involved in the combustion of acetylene is 2C2H2(g)+5O2(g) --> 4CO2(g) + 2H2O(g) a. starting with 175g of both acetylene and oxygen, what is the theoretical yield, in grams, of carbon dioxide?...
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diamonds are measured in carats. 1 carat=.200grams. the density of a diamond is 3.51 g/cm cubed. what is the volume of a 3 carat diamond?
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What is the Lewis dot Diagram for IO3-?
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Table salt and sugar are accidentally mixed A 5.00g sample is burned and 2.20-g of CO2 is produced What is the mass percentage of salt in the mixture?
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How many grams of CaO are required to be the chemical equivalent of 246 gm of Ca( HCO3)2 ?
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To convert nitrobenzene, C6H5NO2, to acetanilide, ,the correct synthetic sequence employs what?
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Sample Questions
- 1. For organic chemistry, what is a concerted shift? How do things like acids or heat affect them? What other factors affect them?
- 2. Which of the following reactions is an acid-base neutralization reaction? Why are the rest of the answers incorrect?
- A. AgNo3 (aq) + NaI (aq) --> AgI (s) + NaNO3 (aq)
- B. S8(s) + 8O2 (g) --> 8SO2(g)
- C. Na3PO4 (s) + 2H2O (l) --> H2 (g) + 2NaOH (aq)
- D. Ca (OH)2 (aq) + 2HI (aq) --> CaI2(aq) + 2H2O (l)
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