Question

Даны следующие вещества: монооксид азота-NO и диоксид кремния-SiO.(а) Рассчитайте массовую долю кислорода в монооксиде азотаb) Рассчитайте массовую долю кислорода в диоксиде кремния.c) Сделайте вывод, в каком соединении массовая доля кислорода больше.Пожалуйста, срочно!​

Answer 1

Ответ:

NO:

M(N)=14                  M(NO)=30

M(O)=16             16/30=0,53

SiO:

M(Si)=28          M(SiO)=44

M(O)=16             16/44=0,36

В монооксиде азота массовая доля кислорода больше.

Answer 2

Відповідь:

M(NO)=30

w(O)=16*100/30=53,3%

M(SiO2)=60

w(O)=32*100/60=53,3%

массовая доля кислорода  в обеих соединениях одинаковая

Пояснення:

Answer 3

Mass Fraction of Oxygen in Nitric Oxide (NO)

To calculate the mass fraction of oxygen in nitric oxide (NO), we need to determine the molar mass of NO and the molar mass of oxygen.

The molar mass of NO can be calculated by adding the atomic masses of nitrogen (N) and oxygen (O):

Molar mass of NO = Atomic mass of N + Atomic mass of O

Using the atomic masses from the periodic table, we find:

Molar mass of NO = 14.01 g/mol + 16.00 g/mol = 30.01 g/mol

Since NO contains one oxygen atom, the mass fraction of oxygen in NO is equal to the molar mass of oxygen divided by the molar mass of NO:

Mass fraction of oxygen in NO = (Molar mass of O / Molar mass of NO) * 100%

The molar mass of oxygen is 16.00 g/mol, so we can substitute the values into the equation:

Mass fraction of oxygen in NO = (16.00 g/mol / 30.01 g/mol) * 100% = 53.33%

Therefore, the mass fraction of oxygen in nitric oxide (NO) is approximately 53.33%.

Mass Fraction of Oxygen in Silicon Dioxide (SiO2)

To calculate the mass fraction of oxygen in silicon dioxide (SiO2), we need to determine the molar mass of SiO2 and the molar mass of oxygen.

The molar mass of SiO2 can be calculated by adding the atomic masses of silicon (Si) and two oxygen (O) atoms:

Molar mass of SiO2 = Atomic mass of Si + 2 * Atomic mass of O

Using the atomic masses from the periodic table, we find:

Molar mass of SiO2 = 28.09 g/mol + 2 * 16.00 g/mol = 60.09 g/mol

Since SiO2 contains two oxygen atoms, the mass fraction of oxygen in SiO2 is equal to twice the molar mass of oxygen divided by the molar mass of SiO2:

Mass fraction of oxygen in SiO2 = (2 * Molar mass of O / Molar mass of SiO2) * 100%

Substituting the values into the equation:

Mass fraction of oxygen in SiO2 = (2 * 16.00 g/mol / 60.09 g/mol) * 100% = 53.33%

Therefore, the mass fraction of oxygen in silicon dioxide (SiO2) is approximately 53.33%.

Comparison of Mass Fractions of Oxygen

The mass fraction of oxygen in both nitric oxide (NO) and silicon dioxide (SiO2) is approximately 53.33%. Therefore, the mass fraction of oxygen is the same in both compounds.

Please note that the calculations provided are based on the molar masses of the elements and compounds involved.