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Reaction rates do NOT tell you how fast A. reactants are being consumed. B. products are being formed. C. substances are changing state. D. energy is being absorbed or released.
Weegy: Reaction rates do NOT tell you how fast C. substances are changing state. (More)
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Asked 9/24/2012 8:58:57 PM
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The equation 2NO2 « N2O4 shows a system A. in chemical equilibrium. B. in physical equilibrium. C. that does not reach equilibrium. D. that does not change.
Weegy: a. in chemical equilibrium. User: Which of the following takes place during a redox reaction? A. Electrons are gained only. B. Electrons are lost only. C. Electrons are both gained and lost. D. Electrons are neither gained nor lost. Weegy: electrons are both gained and lost simultaneously. (More)
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Asked 9/24/2012 9:04:57 PM
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On the periodic table, there are two numbers in the block for the element potassium, K: 19 and 39.098. What are these two numbers, and what do they represent?
Weegy: 19 represents the proton, electron and atomic number 39.098 represents the atomic mass number compared to C-12 (More)
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Asked 9/24/2012 9:54:53 PM
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From left to right across a period in the periodic table, elements become less and more in their properties.
Weegy: From left to right across a period in the periodic table, elements become less solid and more liquid or gasesous state. User: You are given the melting points of three unknown substances and are asked to predict which one is an ionic compound. You would select the compound with the melting point. Weegy: methods of identifying unknowns: Density: Density is equal to mass divided by volume. [ If you're trying to choose between two chemicals, you might want to take the density of the unknown by weighing it on a balance and taking the volume in a gradated cylinder. The chemical with the matching density is your unknown. Color: It's strange to think of something like color being an indicator of what an unknown is, but this is sometimes used by people who are very familliar with the unknown. However, as you might imagine, many chemicals look the same color, so this is only handy in some very limited situations. Smell: Smell can be a handy way of identifying a chemical if you've got a good nose. However, since many chemicals are extremely toxic, this is probably not a test you should use. Melting and boiling points: Most chemicals have melting and boiling points that are very different from others. If you can accurately find the melting and/or boiling temperature of your unknown chemical, you can probably match that value to a table of melting and boiling points to identify your unknown. The big problem with this method: If your chemical is contaminated, this will affect the melting and boiling point. You might also find that it's hard to get really good data in a laboratory setting. ] (More)
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Asked 9/24/2012 10:30:59 PM
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What type of nuclear decay releases energy but not a particle? A. alpha decay B. beta decay C. gamma decay D. electron decay
Weegy: C. gamma decay (More)
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Asked 9/25/2012 8:28:27 PM
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