The radio station z107.7 broadcasts radio waves. What do the numbers 107.7 represent?
2 answers:
Answer : The number 107.7 represent the frequency.
Explanation :
Frequency : It is defined as the number of oscillations per second. the S.I unit of frequency is, Hertz (Hz)
Formula of frequency is,
where,
f = frequency
t = time period
Radio frequency : It is the rate of oscillation of electromagnetic radio waves within the range of 3 kHz to 300 GHz.
Therefore, the number 107.7 represent the frequency.
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Answer:
I think u understand this answers
a. mol O₂=0.5
b. volume O₂ = 25 cm³
c. i. the total volume of the two reactants = 75 cm³
c. ii. the volume of nitrogen dioxide formed = 50 cm³
<h3>Further explanation</h3>Reaction
2NO(gas) + O₂(gas) ⇒ 2NO₂ (gas)
a.
mol NO = 1
From the equation, mol ratio NO : O₂ = 2 : 1, so mol O₂ :
b.
From Avogadro's hypothesis, at the same temperature and pressure, the ratio of gas volume will be equal to the ratio of gas moles
Because mol ratio NO : O₂ = 2 : 1, so volume O₂ :
c.
i. total volume of reactants : 25 cm³+ 50 cm³=75 cm³
ii. the volume of nitrogen dioxide formed :
mol ratio NO : NO₂ = 2 : 2, so volume NO₂ = volume NO = 50 cm³