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A substance contains 36.1 percent calcium and 63.9 percent chlorine by weight. What is the empirical formula of the given compound?
Weegy: Assume 100 g of the compound is present. This converts the percentages into mass. Then, calculate moles of each element: Ca - -> 36.1 g / 40.08 g/mol = 0.9007 Cl - -> 63.9 g / 35.453 g/mol = 1.802 Next, look for the lowest whole-number ratio. [ We do this by dividing by the smallest value: Ca - -> 0.9007 / 0.9007 = 1 Cl - -> 1.802 / 0.9007 = 2 The empirical formula is CaCl2 ] User: hello Weegy: Yes , are there any additional ... (More)
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Asked 7/10/2012 8:50:30 PM
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In a chromatography experiment, chlorophyll pigments are separated using paper. What is the stationary phase in this experiment? User: Which statement best compares the density among the three states of matter? User: Which criteria determine whether a heterogeneous mixture is a colloid or a suspension?
Weegy: Suspensions Suspensions are heterogeneous mixtures from which some of the particles settle with time. Muddy water is a classic suspension, with relatively large solid particles suspended in water. [ Upon standing the solids start to settle to the bottom of the container. In water suspensions the average suspended particle is larger than 100nm, whereas in a solution all particles are less than 1nm. Suspensions are usually quite easy to ... (More)
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Asked 7/11/2012 11:44:39 AM
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wad up
Weegy: Oxygen is a gaseous chemical element vital to respiration. Pure oxygen is used medicinally. User: what's crackin' Weegy: Hello,how can I help you today? (More)
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Asked 7/11/2012 12:16:50 PM
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The metal wire in an incandescent lightbulb glows when the light is switched on and stops glowing when it is switched off. This simple process is which kind of a change?
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Updated 1/17/2013 10:07:28 AM
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The metal wire in an incandescent lightbulb glows when the light is switched on and stops glowing when it is switched off. This simple process is electro-thermal change.
Added 1/17/2013 10:07:28 AM
What are the subatomic particles of an atom?
Weegy: The three main subatomic particles that form an atom are protons, neutrons, and electrons. (More)
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Asked 7/11/2012 1:56:49 PM
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