Concept explainers
Interpretation:
The given table needs to be completed by calculating number of moles, mass in kg or molecules.
Concept introduction:
The relation between number of moles, mass and molar mass of a substance is as follows:
Here, m is mass and M is molar mass.
Molar mass is mass of a substance in 1 mol. Also, in 1 mol of any substance, there are
Answer to Problem 216A
The complete table is as follows:
Propellants | Molecular formula | Mass (kg) | Moles | Molecules |
Hydrogen | H2 | 1.03 ×105 | 5.14×107 | 3.09×1031 |
Oxygen | O2 | 6.14 ×105 | 1.93×107 | 1.16×1031 |
Hydrazine | NH2NH2 | 493 | 1.54×104 | 9.27×1027 |
Monomethyl-hydrazine | CH3NHNH2 | 4909 | 1.04×105 | 6.26×1028 |
Dinitrogen tetroxide | N2O4 | 7.95×103 | 8.64×104 | 5.20×1028 |
Explanation of Solution
- Molecular formula = H2 Number of moles = 5.14 ×107
The calculation of molecules is shown below:
The calculation of mass is shown below:
- Molecular formula = O2 Number of molecules = 1.16 × 1031
The calculation of moles is shown below:
The calculation of mass is shown below:
Molecular formula = N2H4
- Mass of N2H4 = 493 kg The calculation of moles is shown below:
The calculation of molecules is shown below:
- Molecular formula = CH3NHNH2 Mass of CH3NHNH2 = 4909 kg
The calculation of moles is shown below:
The calculation of molecules is shown below:
- Molecular formula = N2O4 Moles of N2O4 = 8.64×104 mol
The calculation of mass is shown below:
The calculation of molecules is shown below:
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Chemistry: Matter and Change
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