Is a strap of leather a pure substance

Ethyl alcohol is produced by the fermentation of glucose, C6H12O6. C6H12O6 (s) → 2 C2H5OH (l) + 2 CO2 (g) ΔH° = - 69.1 kJ Given that the enthalpy of formation is - 277.7 kJ/mol for C2H5OH (l) and - 393.

What are the 2 main sources of sulfur and nitrogen gases in Canada?

Why clouds look white?

Factor f (x) = x² + 4x + 3

3.) What type of energy is released with the faucet? * A.) light B.) electrical C.) mechanical 4.) What type of energy from the sun? * A.) light B.) electrical C.) mechancial

Identify the precipitate (if any) that forms when KOH and Cu (NO3) 2 are mixed

An atom has a mass number of 27 and 14 neutrons. what is the atomic number of this atom?

The two forms of oxygen, O2 (g) and O3 (g), have (1) different molecular structures and identical properties (2) different molecular structures and different properties (3) identical molecular structures and identical properties (4) identical

What is the difference between a distraction and a reaction

if carbon which has an electrongavity of 2.5 bonds with hydrogen, which has an electrongavity of 2.1, the bond between the two atoms will be classified as a (n) covalent bond