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riadik2000 [5.3K]
3 years ago
9

Calculate the density of mercury of it pours exactly 22.5 mL into a graduated cylinder and has a mass of 316 g.

Chemistry
1 answer:
Rasek [7]3 years ago
8 0
Density = mass/volume = 316/22.5 = 14.045g/mL. 
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Answer:

Ver explicacion

Explanation:

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What are valence electrons ?
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What volume (in mL) of a 0.113 M NaCl solution contains 0.087 mol NaCl?
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Using the balanced equation for the next few questions: 4 Fe(s) + 30 (9) - 2Fe2O3(s)
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Answer:

0.075 moles of iron oxide would be produced by complete reaction of 0.15  moles of iron.

Explanation:

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By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

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You can apply the following rule of three: if by stoichiometry 4 moles of Fe produce 2 moles of Fe₂O₃, 0.15 moles of Fe produce how many moles of Fe₂O₃?

moles of Fe_{2} O_{3} =\frac{0.15 moles of Fe*2 moles of Fe_{2} O_{3}  }{4 moles of Fe}

moles of Fe₂O₃= 0.075

<u><em>0.075 moles of iron oxide would be produced by complete reaction of 0.15  moles of iron.</em></u>

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