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larisa [96]
2 years ago
12

The information below describes a redox reaction.

Chemistry
1 answer:
klio [65]2 years ago
6 0
The answer is 2 of the coefficient of silver
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A cough syrup contains 5.0% ethyl alcohol, c2h5oh, by mass. if the density of the solution is 0.9928 g/ml, determine the molarit
WARRIOR [948]
To answer the question above, let us a basis of the 1000 mL or 1 L. 
                 volume = (0.9928 g/mL)(1000mL) = 992.8 g
Then, determine the mass of the alcohol by multiplying the total mass by the decimal equivalent of 5%. 
               mass of alcohol = 0.05(992.8 g) = 49.64 g
Then, determine the number of moles of ethyl alcohol by dividing the mass of alcohol by the molar mass (46 g/mol). 
                       n = 49.64 g/ (46 g/mol) = 1.08 mol
Then, divide the number of moles by the volume (our basis is 1 L)
                       molarity = 1.08 mol/ 1 L = 1.08 M
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A 7.32 g sample of copper is contaminated with 0.81 g of zinc. Suppose an atomic mass measurement was performed on this sample.
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What is the density of the black hole
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The theory of plate tectonics describes the movement of continental plates across the Earth's surface as if they were riding on
emmainna [20.7K]

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B and E

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These two options support the theory of plate tectonics.

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How are all cells similar?
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