Answer:
the conservation of mass means matter can be created or destroyed, it only changes forms
Explanation:
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The balanced equation that illustrates the reaction is:
2C4H6 + 11O2 ......> 8CO2 + 6H2O
number of moles = mass / molar mass
number of moles of oxygen = 2.1 / 32 = 0.065625 moles
Now, from the balanced equation, we can note that:
11 moles of oxygen are required to produce 6 moles of water.
Therefore:
0.065625 moles of oxygen will produce:
(0.065625*6) / 11 = 0.03579 moles of water
number of moles = mass / molar mass
mass = number of moles * molar mass
mass of water = 0.03579 * 18 = 0.644 grams
Answer:
1 that is 100%
Explanation:
here it is given that Fermi energy of the of the metal = 5 e.V
work function= 4 e.V
we have to find the probability that an incident electron will tunnel out if E=109 V/m
WORK FUNCTION : work function is defined as the energy required to withdraw an electron completely from the metal surface.
now the energy per unit volume in electric field is given by
E=
E=
E=
in electron volt E=4.427\times 10^{6}joule × 6.24\times 10^{18}
E=
hence the applied energy per unit volume is greater than the work work function of electron so there is probability of 100% that electron will tunnel out
Answer:
<h3>What Like?</h3>
Explanation:
<h2>I don't even know!</h2>
The time taken or 25% of the molecules to desorb is 2.2 seconds
<h3>What is a first order reaction?</h3>
A first order reaction is one in which the rate of reaction depends on the concentration of a single specie.
Since;
t1/2 = 0.693/k = 0.693/ 0.128 s-1
t1/2 = 5.4 secs
Using the formula;
0.693/t1/2 = 2.303/t log (No/N)
0.693/5.4 = 2.303/t log 1/0.75
0.693/5.4 = 2.303/t log
0.693/5.4 = 0.287/t
t = 2.2 seconds
Learn more about first order reaction: brainly.com/question/12446045