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Which of the following is NOT a step in the operation of a Geiger counter? A. Nuclear radiation ionizes gas in a tube. B. Ionized gas produces an electric current. C. Magnets cause the ions to conduct electricity. D. The electric current is detected and measured.
Weegy: C. Magnets cause the ions to conduct electricity is NOT a step in the operation of a Geiger counter. (More)
Question
Asked 9/27/2012 8:33:46 AM
An industrial process makes calcium oxide by decomposing calcium carbonate. Which of the following is NOT needed to calculate the mass of calcium oxide that can be produced from 4.7 kg of calcium carbonate? A. the balanced chemical equation B. molar masses of the reactants C. molar masses of the product D. the volume of the unknown mass
Question
Updated 9/28/2012 11:01:39 AM
Answer is D.the volume of the unknown mass
Here is explain of your problem. First you have to write the equation: $Ca CO3\rightarrow CaO+CO2$ Then compute the mols of Ca CO3 Then compute the mols of CaO AND AT LAST THE MASS OF CaO
Added 9/28/2012 11:01:39 AM
Because water molecules are polar and carbon dioxide molecules are nonpolar, A. water has a lower boiling point than carbon dioxide does. B. attractions between water molecules are weaker than attractions between carbon dioxide molecules. C. carbon dioxide cannot exist as a solid. D. water has a higher boiling point than carbon dioxide does.
Weegy: Carbon dioxide is a gas at room temperature, and water is a liquid at room temperature. [ Since 'boiling point' is the point at which a liquid becomes a gas, that would mean that the 'boiling point' of CO2 would have to be MUCH lower than water (or lower than room temperature for that matter). Read more: ] (More)
Question
Asked 9/28/2012 10:08:55 AM
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