What is the value of n when the empirical formula is c3h5 and the molecular mass is 205. 4 g/mol ?.
1 answer:
The value of n for the given empirical formula and molecular mass is 5.00.
<u>Given the following data:</u>
- Empirical formula =
- Molecular mass = 205. 4 g/mol.
<u>Scientific data:</u>
- Molar mass of carbon (C) = 12 g/mol.
- Molar mass of hydrogen (H) = 1 g/mol.
To determine the value of n for the given empirical formula and molecular mass:
<h3>How to calculate molecular formula.</h3>First of all, we would determine the gram-mass of the chemical compound as follows:
C_3H_5 = 36+5
C_3H_5 = 41 g/mol.
<u>For the </u><u>molecular formula</u><u>:</u>
(CH)n = 205.4
41n = 205.4
n =\frac{205.4}{41]
n = 5.00
Read more on molecular formula here: brainly.com/question/512891
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Answer:
The percentage of scores higher than 72 is 99.85%
Explanation:
The empirical rule states that about 68% of observations falls within the first standard deviation (µ ± σ), 95% within the first two standard deviations (µ ± 2σ), and 99.7% within the first three standard deviations (µ ± 3σ)
We can use the relationship below
255-σ(61)=72
61σ=255-72
61σ=183
σ=3
The area is as shaded below
The percentage of scores higher than 72 is 99.7%+0.15%=99.85%
