Answer:
One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each molecule of oxygen contains two oxygen atoms.
<h2>
Hey There!</h2><h2>
_____________________________________</h2><h2>
Answer:</h2>
Hz}[/tex]
<h2>_____________________________________</h2><h3>DATA:</h3>
E =
h =
f = ?
<h2>_____________________________________</h2><h3>SOLUTION:</h3><h3 />
Energy of Photon is given by,
E = hf
Rearrange the equation,
f =
where,
E = energy
h = planck's constant
f = frequency
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Substitute the variable in the equation,
f =
Simplify the equation,
f = 5.10 x 10^14 Hz
<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2>
Answer:
0.010g of C-14 would be later after 50,000 years
Explanation:
The kinetics of radioactive decay follows the equation:
Ln (N / N₀) = -kt
<em>Where N could be taken as mass after time t, </em>
<em>N₀ initial mass = 4.30g;</em>
k is rate constant = ln 2 / t(1/2)
<em>= ln 2 / 5730years = 1.2097x10⁻⁴ years ⁻¹</em>
<em />
Replacing:
Ln (N / 4.30g) = -1.2097x10⁻⁴ years ⁻¹ * 50000 years
N / 4.30 = 2.36x10⁻³
N =
<h3>0.010g of C-14 would be later after 50,000 years</h3>
Answer:
NaHCO 3 ( s ) + HC 2 H 3 O 2 ( aq ) ⟶NaHC2H3O2 + H2CO3 → H2O + CO2
NaHCO3 + HC2H3O2 → NaC2H3O2 + H2O + CO2
Explanation:
Sodium bicarbonate and acetic acid reacts to form Sodium acetate and carbonic acid. The carbonic acid then produce carbon dioxide gas and water after undergoing decomposition.
Answer : The activation energy for the reaction is, 52.9 kJ/mol
Explanation :
According to the Arrhenius equation,
or,
where,
= initial temperature =
= final temperature =
= rate constant at =
= rate constant at =
= activation energy for the reaction = ?
R = gas constant = 8.314 J/mole.K
Now put all the given values in this formula, we get:
Therefore, the activation energy for the reaction is, 52.9 kJ/mol