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If you want 1.55 moles of nitrogen trichloride, how many grams should you measure out?

A. 9.33 g
B. 0.0129 g
C. 187 g
D. 120 g

Answer :

1.55 moles of NCl3 is approximately 187 grams. Option C is the correct choice for the measurement.

To find the mass of nitrogen trichloride (NCl3) when you have 1.55 moles, you can use the molar mass of NCl3, which is the sum of the atomic masses of nitrogen (N) and three times the atomic mass of chlorine (Cl).

The atomic mass of N = 14.01 g/mol

The atomic mass of Cl = 35.45 g/mol

So, the molar mass of NCl3 = 14.01 + 3 * 35.45 = 120.36 g/mol (approximately)

Now, you can use the formula:

Mass = Number of moles × Molar mass

Mass = 1.55 moles × 120.36 g/mol ≈ 186.798 g

The closest option is C. 187 g.

The complete question is here:

If you want 1.55 moles of nitrogen trichloride, how many grams should you measure out?

A. 9.33 g

B. 0.0129 g

C. 187 g

E. 120. g

Thanks for taking the time to read If you want 1 55 moles of nitrogen trichloride how many grams should you measure out A 9 33 g B 0 0129 g C. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!

Rewritten by : Barada

Final answer:

To calculate the mass for 1.55 moles of nitrogen trichloride, the molar mass of NCl3 is found to be 120.36 g/mol. Multiplying this by 1.55 moles gives 186.56 grams, which rounds to 187 grams.

Explanation:

To calculate the mass in grams of 1.55 moles of nitrogen trichloride (NCl3), we need to determine the molar mass of the compound. The molar mass is the sum of the mass of one mole of nitrogen (N) and three moles of chlorine (Cl). Using the periodic table, the molar mass of nitrogen is approximately 14.01 grams/mol and chlorine is approximately 35.45 grams/mol.

Therefore, the molar mass of NCl3 is calculated as:

  • Molar mass of N = 14.01 g/mol
  • Molar mass of Cl = 35.45 g/mol × 3 = 106.35 g/mol
  • Total molar mass of NCl3 = 14.01 g/mol + 106.35 g/mol = 120.36 g/mol



To find the mass of 1.55 moles of NCl3, we multiply the number of moles by the molar mass:

1.55 moles × 120.36 g/mol = 186.56 grams

Therefore, to obtain 1.55 moles of nitrogen trichloride, 187 grams should be measured out (rounding to the nearest whole number).