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Which of these chemicals is definitely inorganic? A. one that is made of nitrogen and hydrogen B. one that is made of carbon and oxygen C. one that is made of carbon and hydrogen D. one that is made of nitrogen and carbon
Weegy: C. one that is made of nitrogen and hydrogen User: A hypothesis is A. a well-tested explanation for many observations. B. an observation recorded from an experiment. C. a summary of the results of many experiments. D. a proposed explanation for what is observed. Weegy: A hypothesis is B. a proposed explanation for what is observed. User: The largest number from among the following is: A. 1.80 x 10-4 B. 1.80 x 10-6 C. 1.80 x 10-2 D. 1.80 x 10-8 Weegy: C. 1.80 x 10-2 is The largest number among the given User: How many significant figures are in the measurement 603.040 g? A. 3 B. 4 C. 5 D. 6 Weegy: 5. there are five significant figures in the measurement 603.040 g User: Identify the activity that belongs in the field of chemistry. A. developing medicines B. analysis of a compound C. production of a new plastic D. all of the above Weegy: Identify the activity that belongs in the field of chemistry. Answer: D. all of the above User: Which of the following is not a part of the scientific method? A. observing B. experimenting C. hypothesizing D. proving (More)
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Asked 8/27/2013 12:57:27 PM
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The equation 2C3H7OH(g) + 9O2(g) 6CO2(g) + 8H2O(g) is an example of which type of reaction? A. combustion B. combination C. double-replacement D. decomposition
Weegy: A. combustion User: When the equation Fe + O2 Fe2O3 is balanced, the coefficient for O2 is: A. 4 B. 3 C. 2 D. 1 Weegy: The answer is B. reactant User: This symbol indicates: A. that the reaction is reversible. B. that heat must be applied. C. an incomplete combustion reaction. D. that a gas is formed by the reaction. Weegy: We can not see the symbol. We can only see a question mark. Can you explain the symbol for us? User: When the following equation is balanced, the coefficient in front of HCl is: Ba(s) + HCl(aq) BaCl2(aq) + H2(g) A. 6 B. 3 C. 1 D. 2 Weegy: D. 2. Ba(s) + 2HCl(aq) = BaCl2(aq) + H2(g). User: uestion 15 of 20 5.0 Points A ____ is a whole number that appears before a formula in an equation. A. anion B. cation C. significant figure D. coefficient Weegy: A COEFFICIENT is a whole number that appears before a formula in an equation. [ ] (More)
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Asked 8/30/2013 7:48:35 PM
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A double-replacement reaction takes place when aqueous K2SO4 reacts with aqueous Pb(NO3)2. You would expect one of the products of this reaction to be: A. K2S. B. NaPb. C. PbSO4. D. CNO3.
Weegy: C. PbSO4 is the answer. User: Which of the following statements is incorrect? A. The only way to determine the products of a reaction is to perform the reaction. B. Complete combustion has occurred when all the carbon in the product is in the form of carbon dioxide. C. All chemical reactions can be classified as one of five general types. D. A single reactant is the identifying characteristic of a decomposition reaction. Weegy: C. All chemical reactions can be classified as one of five general types- this statements is incorrect. (More)
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Asked 8/30/2013 7:46:16 PM
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