Au is the symbol for gold. It comes from Latin word for gold, which is Aurunum. Its atomic number is 79.
The Juan de Fuca plate is at a subduction zone which can only occur at a convergent boundary.
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Answer:
Organic chemistry
Explanation:
Organic chemistry is part of the chemistry that studies carbon compounds, which also use organic compounds, which have characteristics.
Answer:
Explanation:
<u>1. Word equation:</u>
- <em>mercury(II) oxide → mercury + oxygen </em>
<u>2. Balanced molecular equation:</u>
<u>3. Mole ratio</u>
Write the ratio of the coefficients of the substances that are object of the problem:
![2molHgO/1molO_2](https://tex.z-dn.net/?f=2molHgO%2F1molO_2)
<u>4. Calculate the number of moles of O₂(g)</u>
Use the equation for ideal gases:
![pV=nRT\\\\\\n=\dfrac{pV}{RT}\\\\\\n=\dfrac{0.970atm\times5.20L}{0.08206atm.L/K.mol\times 390.0K}\\\\\\n=0.1576mol](https://tex.z-dn.net/?f=pV%3DnRT%5C%5C%5C%5C%5C%5Cn%3D%5Cdfrac%7BpV%7D%7BRT%7D%5C%5C%5C%5C%5C%5Cn%3D%5Cdfrac%7B0.970atm%5Ctimes5.20L%7D%7B0.08206atm.L%2FK.mol%5Ctimes%20390.0K%7D%5C%5C%5C%5C%5C%5Cn%3D0.1576mol)
<u>5. Calculate the number of moles of HgO</u>
![\dfrac{2molHgO}{1molO_2}\times 0.1576molO_2=0.315molHgO](https://tex.z-dn.net/?f=%5Cdfrac%7B2molHgO%7D%7B1molO_2%7D%5Ctimes%200.1576molO_2%3D0.315molHgO)
<u>6. Convert to mass</u>
- mass = # moles × molar mass
- molar mass of HgO: 216.591g/mol
- mass = 0.315mol × 216.591g/mol = 68.3g