Answer:
Amerigo Vespucci, was the first European to reach the Caribbean Islands.
Please select the best answer from the choices provided
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Explanation:
Here is the answer to the question above. Ions are made from neutral atoms wherein, it has the same number of protons and neutrons as the neutral atoms. The only difference is that they have difference number of electrons. Hope this answers your question. Have a great day!
The Richter scale is used to rate the magnitude of an earthquake,<span> the amount </span><span>of energy it released. </span><span>Richter ratings only give you an idea of the actual impact of </span><span>an earthquake. </span><span>
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Answer:
The volume of nitrogen oxide formed is 35.6L
Explanation:
The reaction of nitric acid with copper is:
Cu(s) + 4HNO₃ → Cu(NO₃)₂ + 2NO₂(g) + 2H₂O(l)
Moles of copper are:
![4.95cm^3\frac{8.95g}{1cm^3} \frac{1mol}{63.55g} = 0.697 moles](https://tex.z-dn.net/?f=4.95cm%5E3%5Cfrac%7B8.95g%7D%7B1cm%5E3%7D%20%5Cfrac%7B1mol%7D%7B63.55g%7D%20%3D%200.697%20moles)
Moles of nitric acid are:
![230mL\frac{1.42g}{mL} \frac{68g}{100g} \frac{1mol}{63.01g}=3.52moles](https://tex.z-dn.net/?f=230mL%5Cfrac%7B1.42g%7D%7BmL%7D%20%5Cfrac%7B68g%7D%7B100g%7D%20%5Cfrac%7B1mol%7D%7B63.01g%7D%3D3.52moles)
As 1 mol of Cu reacts with 4 moles of HNO₃:
0.697 mol Cu × (4mol HNO₃ / 1mol Cu) = 2.79 moles of HNO₃ will react. That means Cu is limiting reactant.
Moles of NO₂ produced are:
0.697 mol Cu × (2mol NO₂ / 1mol Cu) = <em>1.394 moles of NO₂</em>
Using PV = nRT
<em>Where P is pressure (735torr / 760 = 0.967atm); n are moles (1.394mol); R is gas constant (0.082atmL/molK); T is temperature (28.2°C + 273.15 = 301.35K). </em>
Thus, volume is:
V = nRT / P
V = 1.394mol×0.082atmL/molK×301.35K / 0.967atm
V = 35.6L
<em>The volume of nitrogen oxide formed is 35.6L</em>
AnswerElement Symbol # of Atoms
Magnesium Mg 1
Oxygen O 4
Sulfur S 1
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Explanation: