Question

Рассчитайтемассовые долиэлементов всоединениях.В ответеукажитехимическую формулусоединения,массовая доляазотав которойсамая:А)NOБ)N2O3В)CU(NO3) 2ответ:

Answer 1

а) 0,47

b) 0,37

c) 0,15

в ответе не понимаю, что указать: больше или меньше

Answer 2

Calculating Mass Percent of Nitrogen in Compounds

To calculate the mass percent of nitrogen in compounds, we can use the formula:

Mass percent of nitrogen = (mass of nitrogen in the compound / molar mass of the compound) x 100%

Let's calculate the mass percent of nitrogen in the given compounds.

A) NO (Nitric Oxide)

The molar mass of NO (Nitric Oxide) is approximately 30.01 g/mol. The mass of nitrogen in one mole of NO is approximately 14.01 g.

Using the formula: Mass percent of nitrogen in NO = (14.01 g / 30.01 g) x 100%

The mass percent of nitrogen in NO is approximately 46.68%[[1]].

B) N2O3 (Dinitrogen Trioxide)

The molar mass of N2O3 (Dinitrogen Trioxide) is approximately 76.01 g/mol. The mass of nitrogen in one mole of N2O3 is approximately 42.02 g.

Using the formula: Mass percent of nitrogen in N2O3 = (42.02 g / 76.01 g) x 100%

The mass percent of nitrogen in N2O3 is approximately 55.25%[[2]].

C) CU(NO3)2 (Copper(II) Nitrate)

The molar mass of CU(NO3)2 (Copper(II) Nitrate) is approximately 187.55 g/mol. The mass of nitrogen in one mole of CU(NO3)2 is approximately 42.01 g (from two moles of nitrogen in the compound).

Using the formula: Mass percent of nitrogen in CU(NO3)2 = (42.01 g / 187.55 g) x 100%

The mass percent of nitrogen in CU(NO3)2 is approximately 22.39%[[3]].

Summary

- NO (Nitric Oxide): Mass percent of nitrogen ≈ 46.68% - N2O3 (Dinitrogen Trioxide): Mass percent of nitrogen ≈ 55.25% - CU(NO3)2 (Copper(II) Nitrate): Mass percent of nitrogen ≈ 22.39%

These are the calculated mass percent of nitrogen in the given compounds.