The formula shows that the compound contains 8 hydrogen atoms per molecule, of which the gram molecular mass is 46.07. Each hydrogen atom has a gram Atomic Mass of 1.00794. Therefore, the percent by mass of hydrogen in the compound is 100[8(1.00794)/46.07] or 17.50 %, to the justified number of significant digits. (The value "8" is exact.)
The percentage by mass of hydrogen in benzene (C6H6) is 7.74%. Benzene has a molar mass of 78.11 g/ mol. H has a molar mass of around 1.0079 g / mol. The molar mass of carbon is around 12.011 g / mol.
benzene has 6 carbon atoms an 6 hydrogen atoms per molecule.
Molar mass = 6 x 12 + 6 x 1 = 78
% H = 6 / 78 x 100 = 7.69%
Benzene contain 92,308 % carbon.
7.74%
The formula of water is H2O. The gram atomic mass of hydrogen is 1.008 and the gram atomic mass of oxygen is 15.999. Therefore, the mass percent composition of hydrogen in water is 100{(2)(1.008)/[(2)(1.008) + 15.999] or 11.19 %.The percent composition of hydrogen in water is: 11,19 %.
This is an example of a Friedel-Crafts acylation. One hydrogen from the benzene is replaced by the acetyl portion of the acetyl chloride and the hydrogen and chloride from the benzene and acetyl chloride respectively combine to form HCl. Please see the link.
The percent composition of lithium in LiOH is: 29,21 %.
Phenyl, or Carbolic Acid has a composition of C6H5HO, or C6H6O. that is according to the following website, as of 4th November 2008 http://www.henriettesherbal.com/eclectic/potter-comp/carbolic-acid.html :)
Can you be more specific? Percent composition is usually the percent of an element in a compound.
hydrogen and helium
11.19%
In terms of the number of atoms it is 50%. In terms of mass, it is 5.88%.
The percent composition by element of Ca(C2H3O2)2 is calcium 25.339%, hydrogen 3.824%, carbon 30.375%, and oxygen 40.462%.
The formula of water is H2O. The gram atomic mass of hydrogen is 1.008 and the gram atomic mass of oxygen is 15.999. Therefore, the mass percent composition of hydrogen in water is 100{(2)(1.008)/[(2)(1.008) + 15.999] or 11.19 %.The percent composition of hydrogen in water is: 11,19 %.
The human body contains about 7-10 liters of hydrogen, mostly in the form of water. Hydrogen is a key component of many important molecules in the body, such as water and carbohydrates.
3 %
The composition of Neptune's atmosphere is 80 percent hydrogen, 19 percent helium and 1 percent methane. In addition, there are trace amounts of ethane and hydrogen deuteride.
2 moles of benzene gives 12 moles of hydrogen atoms since benzene is C6H6
Sorry - no oxygen. 90 % hydrogen 9% helium, 1% lithium.
Borium 81.1% (m/m)Hydrogen 18.9% (m/m)
If you think to propane (C3H8): carbon - 81,7 % and hydrogen - 17,3 %.