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To find the percent of oxygen by mass in trinitrotoluene (TNT), you need to know the molecular formula of TNT. TNT contains 30.4% oxygen by mass, so in 0.370 kg of TNT, the mass of oxygen would be 0.370 kg * 0.304 = 0.11248 kg. To convert this to a percentage, divide the mass of oxygen by the total mass of TNT (0.370 kg) and multiply by 100 to get 30.4%.
The molar mass of oxygen in phenylalanine is 16.00 g/mol. To calculate the mass percent of oxygen in phenylalanine, divide the molar mass of oxygen by the molar mass of phenylalanine, then multiply by 100. (16.00 g/mol / 165.19 g/mol) * 100 = 9.68% Therefore, the mass percent of oxygen in phenylalanine is approximately 9.68%.
To find the mass percent of oxygen in aspartic acid, we calculate the molar mass contribution of oxygen (O) in the compound and divide it by the total molar mass of the compound, then multiply by 100%. Aspartic acid has 4 oxygen atoms contributing to a total molar mass of 64.00 g/mol. Therefore, the mass percent of oxygen in aspartic acid is (64.00 g/mol / 133.11 g/mol) * 100% = 48.10%.
Oxygen and silicon are the two elements that make up 75 percent of the total mass of the crustal rocks on Earth.
The percentage of oxygen is 54,84 %.
To find the mass of oxygen in 10 g of zircon, first determine the percentage of oxygen in zircon. Next, calculate the mass of oxygen by multiplying the percentage of oxygen by the total mass of zircon. Finally, convert the result to the desired units if necessary.