I have a few questions, if anyone can help me at all it would be amazing. i need this done by TOMORROW (03/03/2008)
1. Cyanogen has been observed in the atmopshere of Titan, Saturn's largest Moon, and in the gases of the interstellular nebulas. On Earth, it is used as a welding gas and a fumigant. In its reaction with floruine gas, carbon tetrafluroide and nitrogen trifluroride are produced. What mass of carbon tetrafluoride forms when 80.0 grams of each reactant are mixed?
2. An Element "X" has a triiodide with a formula of XI3 (the 3 should be subscript) and a trichloride with a formula of XCL3. The triioidide is quantitantively converted to the trichloride when it is heated in a stream of chlorine, according to the equation:
2XI3 + 3CI2 -> 2XCI3 + 3I2
If 0.8000 grams of XI3 ius treated, 0.3776 grams of CLI3 is obtained.
a.) Calculate the atomic mass of the element X
b.) Identify the element X
3. Hydrogen gas has been suggested to clean fuel because it produces only water vapor when it burns in the presence of O2. If the reaction has a 98.8% reaction yeild, what mass of hydrogen forms from 85.0 grams of water?
answered above.
To solve these questions, you'll need a basic understanding of stoichiometry and the concept of molar mass. Here's an explanation of the steps to solve each question:
1. To find the mass of carbon tetrafluoride formed, you'll need to calculate the number of moles of each reactant and then determine the limiting reactant. Follow these steps:
- Write the balanced chemical equation:
CN + 2F₂ → CF₄ + N₂F₄
- Convert the given mass of each reactant (80.0 grams) to moles using their respective molar masses.
- Calculate the moles of CF₄ produced by using the mole ratio from the balanced equation.
- Finally, convert moles of CF₄ to grams using the molar mass of CF₄.
2. In this question, you are given the mass of XI₃ and the mass of XCl₃ obtained after the reaction. Follow these steps to solve it:
a.) Calculate the atomic mass of the element X:
- Write the balanced chemical equation:
2XI₃ + 3Cl₂ → 2XCl₃ + 3I₂
- Convert the mass of XI₃ to moles using its molar mass.
- Determine the moles of XCl₃ produced using the mole ratio from the balanced equation.
- Finally, divide the mass of XCl₃ obtained by the number of moles calculated to find the atomic mass of element X.
b.) Identify the element X:
- Compare the atomic mass of element X calculated in the previous step with the atomic masses of known elements to determine which element matches.
3. To find the mass of hydrogen formed from the given mass of water, you will need to consider the reaction yield. Follow these steps:
- Write the balanced chemical equation:
2H₂O → 2H₂ + O₂
- Convert the mass of water (85.0 grams) to moles using its molar mass.
- Calculate the moles of hydrogen produced using the mole ratio from the balanced equation.
- Apply the reaction yield percentage (98.8%) to calculate the actual mass of hydrogen formed.
Remember to use the periodic table to determine the molar masses and the stoichiometry of the balanced chemical equations.