Density = mass/volume. 5000/50= 100 grams per cubic centimeter. No substance on Earth has anywhere near that density. Tops is about 20 for osmium and gold.
People finds information from online library catalog. Where can you find an online library catalog is Any of the library's computers, and often the library's homepage.
An online library catalog is known to be an electronic bibliographic database that shows or talks about the books, videotapes, etc. that is often seen and carried by a specific library.
It is known to have originated from a printed source and the library card catalog. It is known to have drawers that has the records of particular items in the library.
See full question below
Where can you find an online library catalog?
A. It depends on whether the library uses the Dewey Decimal System or the Library of Congress System
B. In the same physical location with the card catalog
C. Any of the library's computers, and often the library's homepage
D. Behind the reference librarian's desk
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Answer:
B. CH₅N
Explanation:
The combustion reaction of a compound CₐHₓNₙ with O₂ is:
CₐHₓNₙ + O₂ → a CO₂ + X/2 H₂O + n NO₂
Where 1 mole of CₐHₓNₙ with an excess of O₂ produce a moles of CO₂, X/2 moles of H₂O and n moles of NO₂
Thus, you need to convert the mass of CO₂ and H₂O to moles to find the C:H ratio and determine a possible empirical formula thus:
Moles CO₂ (Molar mass 44g/mol):
44g ₓ (1mol / 44g) = 1 mole CO₂ = 1 mole C
Mole of H₂O (Molar mass 18g/mol):
45g ₓ (1 mol / 18g) = 2.5 moles H₂O = 5 moles H
Thus, in the compound you have 5 moles of H per mole of C, and a possible empirical formula is:
B. CH₅N
The only structure that meet this C:H ratio
