According to the pattern of carbon and hydrogen atoms in alkenes, if a molecule has three carbon atoms, how many hydrogen atoms
2 answers:
<u>Answer:</u> The number of hydrogen atoms must be 6.
<u>Explanation:</u>
Alkenes are unsaturated hydrocarbons in which a single bond is present between carbon and hydrogen atoms and double bond is present between carbon and carbon atoms.
The general formula for writing an alkene is given as where, n = 1, 2, 3, 4....
It is given that number of carbon atoms are 3, which means that n = 3.
Putting (n = 3) in above expression, we get:
Hence, the number of hydrogen atoms must be 6.
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Answer:
The mean free path = 2.16*10^-6 m
Explanation:
<u>Given:</u>
Pressure of gas P = 100 kPa
Temperature T = 300 K
collision cross section, σ = 2.0*10^-20 m2
Boltzmann constant, k = 1.38*10^-23 J/K
<u>To determine:</u>
The mean free path, λ
<u>Calculation:</u>
The mean free path is related to the collision cross section by the following equation:
where n = number density
Substituting for P, k and T in equation (2) gives:
Next, substituting for n and σ in equation (1) gives:
Answer:
<h2>2 g/mL</h2>Explanation:
The density of a substance can be found by using the formula
From the question we have
We have the final answer as
<h3>2 g/mL</h3>Hope this helps you